8. A hat contains 30 white slips of paper numbered from 1 through 30.20 red slip

Question

8. A hat contains 30 white slips of paper numbered from 1 through 30.20 red slips of paper numbered from 1 through 20, 10 yellow slips of paper numbered from 1 through 10 40 blue slips of paper numbered from 1 through 40. If these 100 slips of paper are thoroughly shuffled so that each slip has the same probability of being drawn, find the probabilities of drawing a slip of paper that is a. blue or white; , and b. numbered 5, 15, 25 or 35; c. white and numbered higher than 10 or yellow and numbered higher than5.

Explanation / Answer

a) We have Total blue or white slips = 40+30 = 70

P(Blue or white) = 70/100 = 0.7

b) Total slips of 5, 15, 25, 35

No of slip of 5 = 4

No of slip of 15 = 3

No of slip of 5 = 2

No of slip of 5 = 1

P( slips of 5, 15, 25, 35 ) = 10/100 = 0.1

c) P( White and numbered higher than 10 or Yellow and numbered higher than 5) = (20+5) /100 = 0.4

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