5,385 Answered Questions for the topic probability

Probability

11/22/20

Probability Expected Value
Can someone pls explain the following question in detail with all the steps? If X is a continuous random variable with density function f (x) that is an even function and E(X) exists, show... more
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Probability Math Diagram Mathematics

11/22/20

What is the probability that a randomly selected member of the club?
1. Forty percent of the members of the Chicago Charges Track and Field Club participated in 40 % of the events at the recent provincial meet, while 34% entered the field events, and 18% entered... more
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Probability Math Mathematics Help

11/21/20

You are given seven keys, and you know that one of them opens a treasure chest. 
2. You are given seven keys, and you know that one of them opens a treasure chest.     You try one key after another, in random order. What is the chance that you will open the chest on the first... more
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Probability Math Mathematics Patterns

11/21/20

A lake contains two kinds of trout, rainbow and brown.
2. A lake contains two kinds of trout, rainbow and brown. It is estimated that 40% of the trout are rainbow. Of the rainbow trout, 60% are mature, and of the brown trout, 30% are mature. You have a... more
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Probability Math Mathematics Patterns

11/21/20

1. A factory producing headsets has three assembly lines, A, B, and C, which manufacture 20%, 30%, and 50% of the total production, respectively.
1. A factory producing headsets has three assembly lines, A, B, and C, which manufacture 20%, 30%, and 50% of the total production, respectively. It is known that the products from assembly lines... more
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Probability Math Mathematics Help

11/21/20

An urn contains 40 marbles; 25 are red, 10 are white, and 5 are blue. You choose one marble at random.
a. What is the probability of choosing a white marble?b. What is the probability of choosing a marble that is not blue?c. You choose a marble at random and are told that it is not blue.    What is... more
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Probability Math Fractions Cards

11/21/20

1. You draw one card from a deck of 52.
b. What is the probability of drawing a heart if you know that you have drawn a     red card?c. What is the probability of drawing a heart if you know that you have a face     card?d. What is the... more
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Probability Statistics

11/21/20

Expected Value and Statistics
If X is a continuous random variable with density function f (x) that is an even function and E(X) exists, show that E(X) = 0
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Probability Statistics

11/21/20

Probability Question Normal Distribution
Given that X has a normal distribution with mean 10 and standard deviation 2,find: P(9 <=X <=12) If P(a <= X <= b) = 0.95, then find a and b.
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Probability Statistics

11/21/20

Mathematical Statistics
If X is a continuous random variable with density function f (x) that is an odd function and E(X) exists, show that E(X) = 0.
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Probability Statistics

11/21/20

Statistics please help

A particular professor has noticed that the number of people, P, who complain about his attitude is dependent on the number of cups of coffee, n, he drinks. From eight days of tracking he compiled... more
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Probability

11/20/20

Hello help me solve this
in a class of 100 students 30 are in mathematics moreover of the 40 females in the class 10 are in mathematics if a student is selected at random from the class what is the probability that the... more
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Probability

11/19/20

Suppose a jar contains 14 red marbles and 39 blue marbles. If you reach in the jar and pull out 2 marbles at random at the same time, find the probability that both are red.
Suppose a jar contains 14 red marbles and 39 blue marbles. If you reach in the jar and pull out 2 marbles at random at the same time, find the probability that both are red.
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11/18/20

What is the value of C so that the following function is a probability density function? f(x)=Cx^9.5 --> see description
f(x)=Cx9.5 if 0≤x≤2, 0 otherwise
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Probability Math Statistics

11/17/20

6. Find P (Z > -1.50)
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Probability Math Statistics

11/17/20

6. Three hundred viewers were asked if they were satisfied with TV coverage of a recent disaster
6. Three hundred viewers were asked if they were satisfied with TV coverage of a recent disaster. (15 points)     Female (F)  Male (M)  TOTAL  Satisfied (S)  80  55    Not... more
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Probability Math Statistics

11/17/20

7. According to a National Health Survey
7. According to a National Health Survey, American men’s heights are normally distributed with a mean given by μ=69.7 inches and a standard deviation given by σ=2.8 inches.    a). If a man is... more
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Probability Math Statistics

11/17/20

 The data below are the passing scores on an Algebra exam in one class. For this question, round all answers to the nearesttenth, as needed
 The data below are the passing scores on an Algebra exam in one class. For this question, round all answers to the nearesttenth, as... more
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Probability Math

11/17/20

Suppose the amount of a popular sport drink in bottles leaving the filling machine has a normal distribution with mean 101.5 milliliters (mL)
8. Suppose the amount of a popular sport drink in bottles leaving the filling machine has a normal distribution with mean 101.5 milliliters (mL) and standard deviation 1.6. If 36 bottles are... more
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Probability

11/15/20

Two cards are drawn from a standard deck without replacement. What is the probability that the first card is a club and the second card is red? (Round your answer to three decimal places.)
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Probability

11/15/20

A pair of dice is tossed. Find the probability that the sum on the 2 dice is 8, given that doubles are rolled. (Enter your probability as a fraction.)
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Probability

11/15/20

Compute the conditional probabilities P(A|B) and P(B|A). (Round your answers to three decimal places.) P(A) = 0.7, P(B) = 0.4, P(A and B) = 0.25

P(A/B) = P(B/A) =
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Probability

11/15/20

A bag contains 39 U.S. quarters and eleven Canadian quarters. If four quarters are randomly picked from the bag, what is the probability of getting at least one Canadian quarter?

Answer should be rounded to one decimal place.
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Probability

11/15/20

If a person draws five cards from a standard deck (without replacing them), what is the probability that at least one of the cards is a face card? (Round your answer to one decimal place.)
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Probability

11/15/20

Suppose you ask a friend to randomly choose an integer between 1 and 10, inclusive. What is the probability that the number will be more than 3 or odd? (Enter your probability as a fraction.)
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