Mathematics, 25.12.2019 04:31 mustafakhalil02
)the manager of a local gap store estimates that on average the probability of a customer entering the store and will purchase something is 20% (0.20). assume a binomial distribution. 1. what is the probability that 3 of the next 4 customers will make a purchase? 2. what is the probability that none of the next 4 customers will make a purchase
Answers: 3
, where n= Total number of trials 
![P(x=3)=(4)(0.20)^3(0.80)^{1}\ \ [\because\ ^nC_{n-1}=n]](/tpl/images/0432/5291/e7d25.png)
![P(x=0)=(1)(0.80)^{4}\ \ [\because\ ^nC_{0}=1]](/tpl/images/0432/5291/ac800.png)
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