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A bag has one green ball out of 100 balls. On selection of 50 balls what is probability that the green ball is selected?

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A bag has 100 balls out of which there is one green ball. 50 balls are randomly selected. What is probability that the green ball is selected.

posted May 30, 2017 by anonymous

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1 Answer

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Best answer

P = 99c49/100C50 = 1/2

P = success cases/all cases
All cases = 100C50
Success cases = 1 green ball and any remaining any 49 ball i.e. 99C49

= (99!/(49!*50!))/(100!/(50!*50!))
= 1/49!/100/50!
= 50/100
= 1/2

answer May 31, 2017 by Salil Agrawal

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