A study has shown that 60 of families in a certain area

Reference no: EM13613264

1. If X is normally distributed with a mean of 70 and a standard deviation of 7, find

a. P(X less than or equal to 76)

b. P(62<X<81)

c. the 10th percentile of X

2. A study has shown that 60% of families in a certain area have at least two cars. Find the probabilities that among 15 families

a. 8 have at least two cars

b. More than 10 have at least two cars

c. 6 have fewer than two cars

d. More than 8 have fewer than two cars

Reference no: EM13613264

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