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In a class 40% students study mathematic...

In a class `40%` students study mathematics `25%` study chemistry and `15%` both mathematics and chemistry. If a student is chosen at random the probability that he studies mathematics , If it is known that he studies chemistry is

A

`(1)/(8)`

B

`(3)/(8)`

C

`(2)/(5)`

D

`(3)/(5)`

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The correct Answer is:
D
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AAKASH SERIES-PROBABILITY-Exercise-I
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  2. When a die is rolled, the probability of getting an odd prime number i...

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  3. In a class 40% students study mathematics 25% study chemistry and 15% ...

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  4. Two integers are selected at random from integers 1 to 11. If the sum ...

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  5. The sum of two positive numbers is 10. The probability that their prod...

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  6. Five persons A,B,C,D,E are contesting an election in which 3 persons a...

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  7. P(AuuB)=5//6, P(AnnB)=1//3 and P(barB)=(1)/(2) then A and B are

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  8. One die and a coin are (both unbaised) tossed simultanuonly. The proba...

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  9. A coin and six faced die, both unbaised are thrown simultaneously . Th...

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  10. If P(A)=(1)/(2), P(B)=(1)/(5), A and B are independent events then P((...

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  11. A and B are two possible events of an experiment such that P(A)=0.3, P...

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  12. If the probability for A to fail in one exam is 0.2 and that for B is ...

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  13. The probability that a boy A will get a scholarship is 0.9 and that an...

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  14. If A and B are two independent events such that P(AnnB)=1//6 and P(Ann...

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  15. If A and B are two independent events of a random experiment such that...

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  16. At a selection, the probability of selection of A is 1/7 and that of B...

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  17. In the above problem, the probability that both are selected is

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  18. At a selection, the probability of selection of A is 1/7 and that of B...

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  19. Three cards are drawn from pack successively without replacement, the ...

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  20. Three cards are drawn from pack successively without replacement, pro...

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