# Chapter 4 math problems | Mathematics homework help

Chapter 5, Section 5.5, Problem 61a

In given case, find the probability of x successes in n Bernoulli trials with success probability p for each trial.

The probability is [removed]

Chapter 5, Section 5.5, Problem 65a

About 74% of dog owners buy holiday presents for their dogs. Suppose n = 4 dog owners are randomly selected. Find the probability that three or more buy their dog holiday presents.

Round to four decimal places.

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the absolute tolerance is +/-0.0001

Chapter 5, Section 5.5, Problem 61a

In given case, find the probability of x successes in n Bernoulli trials with success probability p for each trial.

The probability is [removed]

Chapter 5, Section 5.5, Problem 65b

About 75% of dog owners buy holiday presents for their dogs. Suppose n = 4 dog owners are randomly selected. Find the probability that at most three buy their dog holiday presents.

Round to four decimal places.

[removed]

Chapter 5, Section 5.5, Problem 65c

About 75% of dog owners buy holiday presents for their dogs. Suppose n = 4 dog owners are randomly selected. Find the expected number of persons, in the sample, who buy their dog holiday presents.

Round to four decimal places.

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