cards marked with numbers 1,2,3,......,40 are placed in a box and mixed thoroughly. one card is drawn at random from the box. find the probability that the number on the drawn card is a) divisible by 3 and 5 b) a prime number c) a perfect square
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a) 1/20
b) 1/4
c) 1/8. is the answers
b) 1/4
c) 1/8. is the answers
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