Question
Customer Purchases In a department store there are 120 customers, 90 of whom will buy at least 1 item. If 5 customers are selected at random, one by one, find the probability that all will buy at least 1 item.
Step 1
This is given by the ratio of customers who will buy at least one item to the total number of customers. In this case, it is given by: \[ P(\text{buy at least one item}) = \frac{90}{120} = \frac{3}{4} \] Show more…
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