Question

A bag contains 4 red, 5 white and 6 black balls. What is the probability that two balls drawn are redand black?

Answer 1

Red Ball=4

White Ball=5

Black Ball=6

Total Ball=4+5+6=15

$\boxed{\mathbf{Probability=\frac{Favourable \: Outcomes}{Total\: Outcomes}}}$

Total Red And Black Ball=6+4=10 balls

If Two Balls Red and Black Ball chosen , Favourable Outcomes=10

Total Outcomes=15

$\boxed{\mathbf{Probability (R,B)=\frac{10}{15}}}$

$\boxed{\mathbf{Probability (R,B)\implies\frac{2}{3}}}$