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Tattoo bubble gums are on sale for Rs. 5 each. Each bubble gum contains exactly ...
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Tattoo bubble gums are on sale for Rs. 5 each. Each bubble gum contains exactly one tattoo , which
can be one of 5 types with equal probability. Suppose you keep on buying bubble gums and stop
when you collect all the five types of tattoos. What will be your expected expenditure?
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