Question

In a bag there are 3 red balls 4 blue balls and 2 white balls and 1 black ball find the probability of picking a ball which is either red or white ball.

Answer 1

Total number of balls $10$

Number of white balls $2$

Number of red balls $3$

Number of favourable outcome $5$

Provability of picking ball is $\frac{5}{10}=\frac{1}{2}$