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A box contains 2 blue caps, 4 red caps, ...

A box contains 2 blue caps, 4 red caps, 5 green caps and1 yellow cap. If four caps are picked at random, then the probability that none of them is green, is

Text Solution

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Total number of ways of picking out 4 caps=`.^(12)C_4`
favourable ways=`.^(7)C_4`
Probability=>`(.^(7)C_4)/(.^(12)C_4)`=`7/99`
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