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A couple has two children, find the prob...

A couple has two children, find the probability that both children are females, if it is known that the elder childis a female.

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The correct Answer is:
(a) `(1)/(2) (b) (1)/(2)`
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ACCURATE PUBLICATION-PROBABILITY -Questions Carrying Type - 4 marks
  1. A bag contains 3 red and 7 black balls. Two balls are selected at rand...

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  2. Assume that each child born is equally likely to be a boy or a girl. I...

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  3. A couple has two children, find the probability that both children are...

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  4. If P(A)=0.38, P(A cup B) - 0.69, find P(B), if A and B are independent...

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  5. For two events A and B, let P(A)=0.4 and P(B)=p and P(AuuB)=0.6 (i) ...

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  6. An urn contains 4 red and 7 blue balls . Two balls are drawn at random...

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  7. The probabilities of two students A and B coming to the school in time...

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  8. Rishav and Mahesh appeared for an interview. The probability of their ...

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  9. A speaks truth in 75% of cases and B in 80% of cases. The percentage o...

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  10. A speaks truth in 70% of the cases and B in 80% of the cases. In what ...

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  11. Probability of A, B and C of solving a problem are (1)/(5), (1)/(6) an...

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  12. The probability of A hitting a target is 4/5 and that of B hitting it ...

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  13. Probability of solving specific problem independently by A and B are 1...

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  14. A and B toss a coin alternately till one of them tosses a head and win...

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  15. A and B throw two dice simultaneously turn by turn. A will win if he t...

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  16. An urn contains 5 red and 5 black balls. A ball is drawn at random, it...

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  17. There are two bags I and II. Bag I contains 4 white and 3 red balls wh...

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  18. There are two bags I and II . Bag I contains 3 white and 2 red balls a...

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  19. Bag I contains 4 red and 5 black balls and bag II contains 3 red and 4...

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  20. In a set of 10 coins, 2 coins with heads on both sides. A coin is sele...

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