Question

pls answer to this question.. ​

Answer 1

'S' is the sample space. ∴n(s) =10

• Event A: Ball drawn is a non-blue ball.

Total Non-blue balls= 2 red balls + 5 black balls

= 7

• ∴ n(a)= 7

$p(a) = \frac{n(a)}{n(s)}$

$= \frac{7}{10}$

The Probability of getting a blue ball is (option b).