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A room contains 3 sockets for bulbs. If ...

A room contains 3 sockets for bulbs. If from a collection of 10 bulbs, out of which 6 are defective, 3 bulbs are selected at random and put in the sockets, then the probability that the room is lighted is

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A DAS GUPTA-Elementary Probability-Exercise
  1. Four small squares on a chessboard are selected at random. The probabi...

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  2. A coin is tossed three times. The probability of getting head and tail...

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  3. A room contains 3 sockets for bulbs. If from a collection of 10 bulbs,...

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  4. A bag contains 17 markers with numbers 1 to 17 . A marker is drawn at ...

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  5. Five persons entered the lift cabin on the ground floor of an 8 flo...

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  6. A card is drawn at random from a pack of 52 cards. The chance that it ...

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  7. P(A cup B)=P(A cap B) if and only if the relation between P(A) and P(B...

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  8. India plays two matches each with West Indies and Australia. In any ma...

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  9. If x denotes the number of sixes in four consecutive throws of a dice,...

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  10. Let an ordinary coin be tossed 15 times. If Pr denotes the probability...

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  11. Two coins are tossed 4 times. The chance that there will be equal numb...

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  12. The probability that an event A happens in one trial of an experiment,...

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  13. The odds in favour of A winning a game against B are 4 : 3. The probab...

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  14. The probability of a missile hitting a target bridge is1/5. Two miss...

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  15. A dice is thrown six times.The probability of getting three sixes, the...

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  16. Let A = [1, 2, 3, ... , n] and f be any mapping from the set A to itse...

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  17. Two distinct integers x and y are chosen, without replacement, at rand...

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  18. A trunk-call is booked. It is known that a trunk-call booked materiali...

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  19. If two events A and B are such that P(A) =0.3, P(B)=0.4 and P(A'nnB') ...

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  20. The probabilities of two events are 0.25 and 0.50. The total probabili...

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