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[" 20.A man can hit a bird,once in "3" s...

[" 20.A man can hit a bird,once in "3" shots.On this assumption he fires "3" shots."],[" What is the chance that at least one bird is hit? "],[" 21If the probability that a man aged "60" will live to be "70" is "0.65" ,what is the "],[" probability that out of "10" men,now "60" ,at least "8" will live to be "70" ? "],[" 22.A bag contains "5" white."7" red and "8" black balls.If four balls are drawn one "]

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