Practice Test 2 Previoue 21 22 23 24 2526 27 28 29 30 Noxt Question 29 of 31 (1

Question

Practice Test 2 Previoue 21 22 23 24 2526 27 28 29 30 Noxt Question 29 of 31 (1 point) View problem in a pop-up Twenty-six percent of couples who plan to marry this year are planning destination weddings. Assume the variable is binomial. In a random sample of 5 couples who plan to marry, find the probability of the following, Round intermediate calculations and finel answers to three decimal places. Source: Time magazine. Part 1 out of 3 At least 3 couples will have a destination wedding. Plat least 3 couples will have a destination wedding) NEXT Show More 25

Explanation / Answer

p = 0.26

n = 5

This is binomial distribution

P(X = x) = 5Cx * 0.26x * (1 - 0.26)5-x

a) P(X > 3) = P(X = 3) + P(X = 4) + P(X = 5)

= 5C3 * 0.263 * 0.742 + 5C4 * 0.264 * 0.741 + 5C5 * 0.265 * 0.740

= 0.114

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