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Tickets numbered 2,3,4,5,…,100,101 are p...

Tickets numbered 2,3,4,5,…,100,101 are placed in a box and mixed thoroughly. One ticket is drawn at random from the box. Find the probability that the number on the ticket is
(i) an even number
(ii) a number less than 16
(iii) a number which is a perfect square
(iv) a prime number less than 40.

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