SOLUTION: Based upon statistical studies it has been found that 0.19% of all births in the United States will result in triplets being born. If 29,700 births are selected at random what is

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Question 646136: Based upon statistical studies it has been found that 0.19% of all births in the United States will result in triplets being born. If 29,700 births are selected at random what is the probability that:
A. At most 50 of them will result in triples being born?
B. Between 45-70 of them will result in triplets being born?
Please help, would be much appreciated
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

Bionomial Probability Distribution: p = .19 and n = 29,700

Using TI-83 Calculator to Compute Binomial Probability Distribution Values

Press 2nd VARS [DISTR].Scroll down to A:binompdf  and Press ENTER. 

enter data and Press ENTER. 

P(x ≤ 50) is  binompdf(29700, .19, 50)

P(between 45-70) = P(x ≤ 70)- P(x ≤ 45)

                 = binompdf(29700, .19, 70) - binompdf(29700, .19, 45)