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Three bags contain a number of red and w...

Three bags contain a number of red and white balls as follows:

The probability that bag i will be chosen and a ball is selected from it is `(i)/(6)`, i = 1, 2, 3. What is the probability that,
(i) a red ball will be selected ?
(ii) a white ball is selected ?

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The correct Answer is:
`(i) (7)/(18), (ii) (11)/(18)`
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