1.

A bag contains 5 red balls, 6 blue balls, 4 green balls and 3 black balls. If a ball is drawn at random find the probability that it is not blue1). 1/32). 2/33). 3/44). 3/5

Answer»

PROBABILITY of an event = Number of FAVORABLE outcomes/Total number of outcomes

Total no. of balls in the BAG = 5 + 6 + 4 + 3 = 18

The probability that the ball drawn is not blue = 1 – Probability of the ball being blue

Probability of the ball being blue = 6C1/18C1 = 6/18 = 1/3

⇒ Probability that the ball drawn is not blue = 1 – 1/3 = 2/3


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