1.

3 numbers are chosen at random from the first 20 natural numbers. Then the probability that the product is even is

Answer»

`(.^(10)C_(3))/(.^(20)C_(3))`
`1-(.^(10)C_(3))/(.^(20)C_(3))`
`(10)/(.^(20)C_(3))`
`(1)/(.^(20)C_(3))`

ANSWER :B


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