Out of 15 consecutive numbers, 2 are chosen at random. The probability that they are both odds or both primes is  Choose the correct choice from the following options.
A) 1/6 B) 1/9 C) 1/3 D) 1/7 E) 1/1
A leap year has 52 weeks and two days   Total number of cases = 7   Number of favourable cases = 1   i.e., {Saturday, Sunday}   Required Probability = 1/7   Answer: 1/7
<result>D</result>
Out of 15 consecutive numbers, 2 are chosen at random. The probability that they are both odds or both primes is