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I just took the test. The correct answer is:
I think the answer is 76 because the tree is halfway between building and stake
or it could be 57 either one but 70% it is 76
Answer: Mean = 5.25
Variance = 1.3125
Standard deviation = 1.456
Step-by-step explanation:
The mean and variance of a binomial distribution with parameters n (number of trials) and p ( the probability of getting success in each trial) is given by :-

Given : The total number of enter a clothing store : n=7
The probability of a customer making a purchase= 0.75
Now,

6 is the answer 18 divided by 3 equals to 6 so that’s the answer