Out of 15 consecutive numbers, 2 are chosen at random

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

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #5140