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A number is chosen at random among the first 120 natural numbers. The probability of the number chosen being a multiple of 5 or 15 is ?
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- 1/5
- 1/8
- 1/6
- None of these
Correct Option: A
∵ Total no. of favourable cases i,e., (5, 10, 15, 20, 25, 30, ....., 105, 110, 115, 120) = 24.
∴ Reqd . Prob = 24/120 = 1/5
