A box contains 20balls.bearing the numbers 1,2,3,........30.a ball is drawn at random from the box what is the probability that the number of the ball is 1)an odd number,2)devesible by 2or3,3)a prime number,4)not devesible by 10.
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1) 1/2 2) devisible by 2 is 1/2; devisible by 3 is 1/3 3) 11/30 4) 1/10
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