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A bag contains 4 red and 6 black balls. ...

A bag contains 4 red and 6 black balls. A ball is drawn at random from the bag, its colour is observed and this ball along with two additional balls of the same colour are returned to the bag. If now a ball is drawn at random from the bag, then the probability that this drawn ball is red, is

A

`2/5`

B

`1/5`

C

`3/4`

D

`3/10`

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The correct Answer is:
A
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DISHA PUBLICATION-PROBABILITY -2-EXERCISE - 2 : CONCEPT APPLICATOR
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  5. consider an event E=E(1)capE(2)capE(3) find the value of P(E) if P(E(1...

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

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  9. For any two independent events E1 and E2 P{(E1uuE2)nn(bar(E1)nnbar(E2)...

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  10. Mr. A randomly picks 3 distinct numbers from the set {1, 2, 3, 4, 5, 6...

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  11. If P(B)=3/5,P(A//B)=1/2andP(AcupB)=4/5, then P(AcupB)'+P(A'cupB) is eq...

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  12. The probability of India winning a test match against West Indies i...

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  13. A coin is tossed three times in succession. If E is the event that ...

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  14. A die marked 1, 2, 3 in red and 4, 5, 6 in green is tossed. Let A be ...

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  15. For two events A and B, if P(A)P((A)/(B))=(1)/(4) and P((B)/(A))=(1)/(...

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  16. If E and F are independent events such that 0ltP(E)lt1 and 0ltP(F)lt1,...

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  17. Two aeroplanes I and II bomb a target in succession. The probabilities...

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  18. If A and B play a series of games in each of which probability that A ...

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  19. In a competitive examination, an examinee either guesses or copies or ...

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  20. Suppose X is a random variable which takes values 0,1,2,3,.... and P(X...

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  21. Die A has 4 red and 2 white faces, whereas die B has 2 red and 4 wh...

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