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What is probability that all four at least three bridesmaids

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Question - Psychology and Human Behavior Many organizations publish wedding guidelines with specific suggestions regarding the reception, wedding cake, flowers, and even themes and styles. However, the number of bridesmaids and groomsmen is usually a very personal decision made by the bride and groom. For semiformal weddings, one to six bridesmaids are typical, with a possible flower girl and/or ring bearer.16 Suppose the probability distribution for the number of bridesmaids at a semiformal wedding is given in the table below.

x

1

2

3

4

5

6

p(x)

0.05

0.21

0.34

0.27

0.08

0.05

a. Find the mean, variance, and standard deviation for the number of bridesmaids at a semiformal wedding.

b. Suppose a randomly selected semiformal wedding has at least four bridesmaids. What is the probability that it has exactly six bridesmaids?

c. Suppose four semiformal weddings are randomly selected. What is the probability that all four have at least three bridesmaids?

Reference no: EM131744748

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