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There are two bags, one of which contain...

There are two bags, one of which contains 3 black and 4 white balls while the other contains 4 black and 3 white balls. A die is thrown. If it shows up 1 or 3, a ball is taken from the `1^(st)` bag, but it shows up any other number, a ball is chosen from the `2^(nd)` bag. Find the probability of choosing a black ball.

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The correct Answer is:
`(11)/(21)`
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KUMAR PRAKASHAN-PROBABILITY-Solutions of NCERT Exemplar Problems (Long Answer Type Questions)
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  2. Three bags contain a number of red and white balls as follows: Th...

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  6. There are two bags, one of which contains 3 black and 4 white balls wh...

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  8. By examining the chest X-ray probability that T.B. is detected when pe...

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  9. An item is manufactured by three machines A, B and C. Out of the total...

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  10. Let X be a discrete random variable whose probability distribution is ...

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  11. The probability distribution of a discrete random variable X is given ...

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  12. The probability distribution of a random variable X is given as under ...

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  13. A bag contains (2n + 1) coins. It is known that n of these coins have ...

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  14. Two cards are drawn successively without replacement from a well shuff...

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  15. A dice is tossed twice. A 'success' is getting an even number on a tos...

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  16. There are 5 cards numbered 1 to 5, one number on one card. Two cards a...

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