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 #18500