math
A bag contains n cards, each having one of the consecutive numbers (1, 2, 3, 4, .... n) written on it, with each number being used once. The probability of drawing a card with a number less than or equal to 10 is 4/10. How many cards are in the bag?
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KG

ten, of course.posted by bobpursley

25
posted by Jennifer

25
posted by rolly
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