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3,372 Answered Questions for the topic probability

Probability Math Statistics

1h

If 8 pairs of fair dice are rolled, approximate the probability that the sum of the values obtained (which ranges from 16 to 96) is between 30 and 40 inclusive.

If 8 pairs of fair dice are rolled, approximate the probability that the sum of the values obtained (which ranges from 16 to 96) is between 30 and 40 inclusive.
Probability

13h

The amount of time to complete a physical activity in a PE class is approximately normally normally distributed with a mean of 37.3 seconds and a standard deviation of 5.6 seconds.

The amount of time to complete a physical activity in a PE class is approximately normally normally distributed with a mean of 37.3 seconds and a standard deviation of 5.6 seconds.  What is the... more
Probability Math Statistics

15h

what is the approximate probability that fewer than 175 chips will be defective?

Each computer chip made in a certain plant will, independently, be defective with probability .2. If a sample of 1,000 chips is tested, what is the approximate probability that fewer than 175... more
Probability Statistics

23h

C(20, 8) = 20! ÷ [(8)!*(12)!] =

A caterer offers 20 different types of dessert. In how many ways can 8 of them be chosen for a banquet if the order doesn’t matter?
Probability

2d

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
Probability Math Diagram

3d

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
Probability Math Mathematics

3d

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
Probability Math Mathematics

3d

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
Probability Math Mathematics

3d

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
Probability Math Mathematics

4d

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
Probability Math Fractions

4d

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
Probability Statistics

4d

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
Probability Statistics

4d

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.
Probability Statistics

4d

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.
Probability Statistics

4d

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
Probability

5d

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
Probability

5d

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.
Probability Math Statistics

8d

6. Find P (Z > -1.50)

Probability Math Statistics

8d

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
Probability Math Statistics

8d

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
Probability Math Statistics

8d

 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
Probability Math

8d

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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