788 Answered Questions for the topic Probability & Statistics

Probability & Statistics

02/08/17

Probability of shooting free throws is 90% (9/10) If player makes two free throws in a row, x is the number of free throws made. what is P(x=2)
Probability of shooting free throws is 9/10.  If player makes two free throws in a row, x is the number of free throws made.  What is P(x=2)
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Probability & Statistics

01/29/17

gcse probability
there is a fair five sided spinner the spinner has two black sections and three white sections the sections are numbered as 1,2,3,3,3 1,3,3 is white sections another three is a black section 2... more
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Probability & Statistics

01/13/17

what kind of maths would help me predict and guess the next random event.
i got 4 suits. hearts, diamonds, spades and clubs. one suit is dealt out randomly one after the other. is there any maths/probabilities that would help me predict/guess or look for certain patterns.
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Probability & Statistics Math Probability Math Help

01/09/17

There are 6 girls 5 guys available to go on a trip and they need 4 people what is the probability that there me more girls then guys?
Need help figuring it out the answer is 23/66 but I dont know how i got there?!
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Probability & Statistics Statistics Probability Algebra

12/31/16

When a biased coin is tossed, the probability of getting a tail is 1/4. If the coin is tossed two times, what is the probability of getting two heads?
I'm having a little trouble with this
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Probability & Statistics Probability Problem Solving Word Problems

12/29/16

What is the expected number of greengreen balls in the​ sample
Suppose three balls are drawn (with replacement) from a bag that contains 4 red balls and 6 green balls. The number of green balls is counted. What is the expected number of greengreen balls in the... more
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12/15/16

Discrete probability distributions
If you select a red diamond picture card (i,e.) a card that doesn't have a number on it) you win $100. It costs $10 to play this game. What is your expected earnings? if you played this game 10,000... more
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12/14/16

What is the probability that the random quadratic expression x^2+2x-15 will be more than 0 if x is chosen randomly over the interval (-10,10)
What is the probability that the random quadratic expression x^2+2x-15 will be more than 0 if x is chosen randomly over the interval (-10,10)
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Probability & Statistics

12/13/16

Dice roll probability question
Suppose I have a fair eight-sided die with three sides painted red and five sides painted blue, and roll it 4 times. Let X be the number of times the die lands with a red side facing up.   What is... more
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Probability & Statistics

12/10/16

What is the probability that the family has at least 1 boy? What is the probability that the family has 2 boys and 2 girls?
Each newborn baby has a probability of approximately 0.49 of being female and 0.51 of being male. The family has four children. 
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Probability & Statistics

12/10/16

Finding the probability
Sheldon has cereal for breakfast everyday. Each day he randomly selects from the six different cereals on his self. The probability that Sheldon has "Just Cereal", one of the cereals, on the self,... more
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Probability & Statistics

12/07/16

two fair dice are rolled. What are the odds in favor of the event that the sum of the two numbers on the dice is 4
A. 1 to 11 B. 1 to 12 C. 1 to 4 D. 1 to 3  
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Probability & Statistics Math Statistics Probability

12/07/16

A Probability Question (Squash Game)
A squash game consists of rallies problem.  (Question):-   Notes:- P(A wins) = ra / (ra+rb), wins a point in a rally 0 < ra ≤ 100   Suppose player (A) has ability ra = 60 and... more
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Probability & Statistics

12/07/16

if a business wants to be able to save $200,000 to buy new production equipment in 4 years, how much will it have to invest every quarter at 6% interest?
Must find the quarterly payments with 6% interest needed to raise $200,000 in four years.
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Probability & Statistics Probability

12/04/16

Show that if P (E) = 1, then P (H l E) = P (H)
How to show a proof using probability rules?
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Probability & Statistics

12/02/16

A box contains
A box contains 1010 transistors, 44 of which are defective. If 44 are selected at random, find the probability thata. All are defective.b. None are defective
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Probability & Statistics

12/02/16

PROBABILITY
A box contains 13 green marbles and 9 white marbles. If the first marble chosen was a white marble, what is the probability of choosing, without replacement, another white marble?
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Probability & Statistics

12/02/16

P(a) = 0.5 , p(b) = 0.7 what is p(a intersection b)
I am new to probality and trying to learn probality concepts but i am stuck on this any help would be helpfull .
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Probability & Statistics

12/01/16

P(a) = 0.5 , p(b) = 0.7 what is p(a | b)
I am trying to learn conditional probality but not able to figure solution for this any solution would be of great help
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Probability & Statistics Math Math Word Problem

11/27/16

The probability of a woman's pregnancy
The probability of a woman's pregnancy will exceed 9 month is 0.314. In 6 human births, what is the probability that the number of births will exceed 9 months is:1. Exactly 32. Exactly 53. At least 5
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Probability & Statistics

11/20/16

Statistics Question
A medication causes headaches as a side effect in 15% of patients who use it. Determine the probability that in a random sample of 20 people exactly 3 patients experience headaches as a side effect.
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Probability & Statistics Probability

11/18/16

whats the appropriate model for the distribution, the mean and the standard deviation?
Pew research reported tht in 2013 78% of all teens had cell phones, we randomly picked 100 teens, let p(hat) represent the proportions of teens in this sample who own a cellphone
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Probability & Statistics Statistics Probability Statistics Question

11/16/16

Probability Function
The probability density function f(x) of a continuous random variable X is:   f(x)={ -kx, If -1<x<o       ={k, If o≤x<1, where k is a positive constant.       ={o, otherwise. I, Graph... more
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Probability & Statistics

11/13/16

Ways to assign nine accounts to three salesmen
How many ways can nine accounts are assigned to three different salesmen so that each one gets three accounts? How many ways if one particular pair of accounts cannot be assigned to the same salesman? more
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Probability & Statistics

10/31/16

no. of events of a sample space
in case one outcome is to be selected, there are 2^n events that can be formed of a finite sample space. what if 2 or more than 2 outcomes are selected, how can we determine the no. of all possible... more
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