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Problem 57E: Chapter: CH6 Problem: 57E A telemarketer calls people and tries to sell them a subscription to a daily newspaper. On 20% of her calls, there is no answer or the line is busy. She sells subscriptions to 5% of the remaining calls. For what proportion of calls does she make a sale? Step-by-step solution: 7 100%(5 ratings) for this solution Step 1 of 4 On 20% of her calls, there is no answer or the line is busy. She (telemarketer) sells subscriptions 5% of the remaining calls. We define the events: Let B = line is busy B" = line is not busy S = sale S" = does not sale