Question

A bag contains 5 white, 7black, 4red balls ,3balls are drawn from ramdom .Find the probability that all the 3 balls white​

Answer 1

Answer:

Probability =Number of favourable outcomes/Total number of outcomes

That is, P=10/560=1/56

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Answer 2

Answer:

Total number of balls = 5+7+4 = 16

Total number of ways in which three balls can be drawn = 16^C 3 = 16! /(16 - 3 )!3! 3! = 16! /13! 3!=560

Total number of white balls =5

Number of ways in which three white balls can be drawn = 5^ C 3 = 5! /(5−3)!3! = 10

∴ required probability = 10/560 = 1/56

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