How many calls will raaj have to take

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Customer center operator. Raaj works at the customer service call center of a major credit card bank. Cardholders call for a variety of reasons, but regardless of their reason for calling, if they hold a platinum card, Raaj is instructed to offer them a double-miles promotion.

About 10% of all cardholders hold platinum cards, and about 50% of those will take the double-miles promotion.

On average, how many calls will Raaj have to take before finding the first cardholder to take the double-miles promotion?

Reference no: EM131418027

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