SOLUTION: A mail-order company has an 8% success rate. If it mails advertisements to 600 people, find the probability of getting fewer than 40 sales.

Question 1150407: A mail-order company has an 8% success rate. If it mails advertisements to 600 people, find the probability of getting fewer than 40 sales.
Answer by VFBundy(438) (Show Source): You can put this solution on YOUR website!
n = 600
p = 0.08
q = 0.92

M = np = 600(0.08) = 48

SD = = = = 6.645

P(x < 40) ----> P(x < 39.5)

z = = = = -1.28

Look up -1.28 on a z-table. The result is 0.1003. This means there is a 0.1003 probability of fewer than 40 sales.
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