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 answers.
A) 1/8  B) 1/7  C) 1/0  D) 1/2  E) 1/3
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>B</result>
Out of 15 consecutive numbers, 2 are chosen at random. The probability that they are both odds or both primes is ?