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There are 25 disc numbered 1 to 25. They...

There are 25 disc numbered 1 to 25. They are put in a closed box and shaken throughly. A disc is drawn at random from the box.
Find the probability that the number on the disc is :
(i) an odd number
(ii) divisible by 2 and 3 both
(iii) a number less than 16.

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The correct Answer is:
`13/(25), 4/(25), 3/(5)`
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