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Out of 15 consecutive numbers, 2 are chosen at random. The probability that they are both odds or both primes is_________?

/ Mathematics Mcqs, Probability / By
Out of 15 consecutive numbers, 2 are chosen at random. The probability that they are both odds or both primes is_________?

A. 10/17
B. 10/19
C. 46/105
D. Cannot be determined
Explanation:
There is no definite formula for finding prime numbers among 15 consecutive numbers. Hence the probability cannot be determined.