Question

A bag contains 3 red balls, 4 blue balls and 1 yellow ball, all the balls being identical in shape and size. If a ball is taken out of the bag without looking into it; find the probability that the ball is yellow.

Answer 1

Total number of balls in the bag = 3 + 4 + 1 = 8 balls 

Number of possible outcomes = 8 = n(S) 

Event of drawing a yellow ball = {Y}

n(E) = 1

Probability of drawing a yellow ball = `(n(E))/(n(S)) = 1/8 `