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Question 3. In a shop there are k of postcards. We want to send postcards to n friends. (i) In how many different ways can

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Question 3. In a shop there are k of postcards. We want to send postcards to n friends. (i) In how many different ways can this be done? () What happens ifwe want to send them different cards? (iii) What happens if we want to send two different cards to each of them

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