AP EAPCET 08-Jul-2022 Shift 2 Paper

There are 6 black, 4 red, 2 white and 3 blue shirts.
2 shirts can be picked in ‌15C2 ways
2 white shirts can be picked in ‌2C2 ways.
2 blue shirts can be picked in ‌3C2 ways.
Probability of getting 2 white shirts =‌

‌2C2

‌15C2

Probability of getting 2 blue shirts =‌

‌3C2

‌15C2

∴ Required probability
=‌

‌2C2+‌3C2

‌15C2

=‌

1+3

(‌ 15! 2!13! )

=‌

4×2

15×14

=‌

4

105