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Discrete Math

09/13/17

A multiple choice test consists of four questions

A multiple choice test consists of four questions, each of which has five choices. Each question has exactly one correct answer. William guesses randomly at each answer. What is the probability... more

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Discrete Math

09/11/17

in a class of 60 students

In a class of 60 students, everyone has either a pierced nose or a pierced ear. The professor asks everyone with a pierced nose to raise his or her hand. Eight hands go up. Then the professor asked... more

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Discrete Math

09/10/17

Consider the following pseudocode function.

Consider the following pseudocode function.function Crunch(x R) if x ≥ 100 then return x/100 else return x + Crunch(10 · x)(a) Compute Crunch(6).Crunch(6) = 1 (b) What happens if you... more

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Discrete Math

09/04/17

A multiple choice test consists of four questions, each of which has five choices. Each question has exactly one correct answer.

A multiple choice test consists of four questions, each of which has five choices. Each question has exactly one correct answer. William guesses randomly at each answer. What is the probability... more

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Discrete Math

09/04/17

Refer to Example 4.40. An urn contains six red balls, six white balls, and six blue balls, and sample of four balls is drawn at random without replacement.

Refer to Example 4.40. An urn contains six red balls, six white balls, and six blue balls, and sample of four balls is drawn at random without replacement. Compute the probability that all of the... more

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Discrete Math

09/03/17

for the set c={5,7,9,11,14,19} determine n(C)

Discrete math

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Discrete Math

08/27/17

There are 14 different pizza toppings, and Arturo must rank his top 4 in order.

There are 14 different pizza toppings, and Arturo must rank his top 4 in order. How many different possible rankings are there? __________

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Discrete Math

08/27/17

The following problem refers to strings in A, B, ..., Z.

The following problem refers to strings in A, B, ..., Z. How many three-letter strings are there that begin with M ? _________

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Discrete Math

08/27/17

Bill has four one-piece jump suits, six pairs of work pants, and seven work shirts. He either wears a jump suit, or pants and a shirt to work. How many differen

Bill has four one-piece jump suits, six pairs of work pants, and seven work shirts. He either wears a jump suit, or pants and a shirt to work. How many different possible outfits does he have?

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Discrete Math

08/27/17

A restaurant offers six different kinds of soup and three different kinds of salad.

(a) If you are having either soup or salad, how many choices do you have? ___9______ (b) If you are having both soup and salad, how many choices do you have? _________

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Discrete Math

08/27/17

Possible grades for a class are A, B, C, D, and F. (No +/− 's.)

How many ways are there to assign grades to a class of eight students?

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Discrete Math

08/13/17

A league of 20 teams is playing a "round-robin" style tournament,

A league of 20 teams is playing a "round-robin" style tournament, where each team plays every other team exactly once. How many games total need to be played? _____ Justify your answer using a... more

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Discrete Math

07/30/17

Consider the following definitions.

Definition. An integer n is alphic if n = 4k + 1 for some integer k.Definition. An integer n is gammic if n = 4k + 3 for some integer k. Show that 19 is gammic.19 = 4 ( ___ )+3

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Discrete Math

07/22/17

Consider the following list of numbers.

128, 682, 121, 516, 601, 51, 49 The height of a binary search tree is the maximum number of edges you have to go through to reach the bottom of the tree, starting at the root. What is the height of... more

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Discrete Math

07/22/17

Write down all elements of ({8, 9, 10} ∩ {9, 10, 11, 12}) ∪ {13, 14}.

(Enter your answer in set notation.)

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Discrete Math

07/22/17

How many students have piercings both on their ears and their noses?

In a class of 30 students, everyone has either a pierced nose or a pierced ear. The professor asks everyone with a pierced nose to raise his or her hand. Seven hands go up. Then the professor asked... more

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Discrete Math Proofs Functions

05/03/17

Find an example of a set A and functions f :A→A and g:A→A such that f◦g=idA but g ◦ f ̸= idA

Find an example of a set A and functions f :A→A and g:A→A such that f◦g=idA but g ◦ f does not equal idA. I am not sure what idA means or an example for this

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Discrete Math

04/01/17

∀x(2x+1≥x)

what is the truth value of the following

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Discrete Math

02/27/17

Combinations and Permutations - C(n+2,n)

I need to express my result as a polynomial, we were given formulas which states the answers however I cannot find the formulas for these last 2 A) C(n+2,n) C) C(C(n,k),(n¦(n-k))) (the... more

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Discrete Math Math Set Theory Sets

01/27/17

Discrete Math / Set Theory - Proof

Hi I have 2 problems that I need to say whether or not they are true or not and then write a proof for my answer. I am really struggling and could use a little help thank you 1) (X ⊆ Y... more

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Discrete Math Mathematics Discrete Mathematics Math Answers

01/02/17

Home Work Assignmet

1. How many different positive integers can be made from the digits {2, 4, 6, 8} if repetitions are allowed? 2. What is the telescoping form of f(x) = x4 + 7x3 - x2 + 2x + 1 ? 3. Let r =... more

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Discrete Math Calculus Number Theory Discrete Mathematics

12/20/16

let d=(a,b) then a|bc if and only if a/d is a divisor of c

prove it if it is correct or give counterexample if it is falselet d=(a,b) then a|bc if and only if a/d is a divisor of c

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Discrete Math

12/15/16

Discrete Math onto function question

Can anyone tell me if: F(n) = 3n^2 + 1 is one-to-one or onto? I'm pretty sure it's neither because n^2 itself isn't onto, but I need second opinions...

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Discrete Math Relations And Functions Discrete Mathematics

12/12/16

Composition of relations on the real numbers.

Here are four relations defined on R, the set of real numbers:R1 = { (x, y): x ≤ y }R2 = { (x, y): x > y }R3 = { (x, y): x < y }R4 = { (x, y): x = y } Describe each relation below. (Hint:... more

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Discrete Math Discrete Mathematics

12/08/16

Relations and Functions (Home Work)

The Fibonacci sequence F0, F1, F2, F3, ... is an infinite sequence defined by the two initial values F0 =0, F1 =1, and the rule Fk = Fk-2 + Fk-1 for all k ≥ 2. Let Μ = [1 1 1 0]... more

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A multiple choice test consists of four questions

in a class of 60 students

Consider the following pseudocode function.

A multiple choice test consists of four questions, each of which has five choices. Each question has exactly one correct answer.

Refer to Example 4.40. An urn contains six red balls, six white balls, and six blue balls, and sample of four balls is drawn at random without replacement.

for the set c={5,7,9,11,14,19} determine n(C)

There are 14 different pizza toppings, and Arturo must rank his top 4 in order.

The following problem refers to strings in A, B, ..., Z.

Bill has four one-piece jump suits, six pairs of work pants, and seven work shirts. He either wears a jump suit, or pants and a shirt to work. How many differen

A restaurant offers six different kinds of soup and three different kinds of salad.

Possible grades for a class are A, B, C, D, and F. (No +/− 's.)

A league of 20 teams is playing a "round-robin" style tournament,

Consider the following definitions.

Consider the following list of numbers.

Write down all elements of ({8, 9, 10} ∩ {9, 10, 11, 12}) ∪ {13, 14}.

How many students have piercings both on their ears and their noses?

Find an example of a set A and functions f :A→A and g:A→A such that f◦g=idA but g ◦ f ̸= idA

∀x(2x+1≥x)

Combinations and Permutations - C(n+2,n)

Discrete Math / Set Theory - Proof

Home Work Assignmet

let d=(a,b) then a|bc if and only if a/d is a divisor of c

Discrete Math onto function question

Composition of relations on the real numbers.

Relations and Functions (Home Work)

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