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In a class of 50 students, 20 are boys ...

In a class of 50 students, 20 are boys and rest are girls. A student is selected at random. Find the probability of selecting a boy.

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NAGEEN PRAKASHAN ENGLISH-PROBABILITY-EXERCISE
  1. The odds against of the occurrence of an event are 4:5 . Find the prob...

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  2. The odds against of the occurrence of an event are 6:7. Find the proba...

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  3. In a class of 50 students, 20 are boys and rest are girls. A student ...

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  4. The probability of the occurrence of an event is 3/10. Find the probab...

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  5. The probability of the non-occurrence of an event is 2/7. Find the pro...

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  6. In a horse race, the probability that horse A can win is 2/5 and the p...

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  7. The probabilities that three children can win a race are 1/3,1/4 and 1...

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  8. In an essay competition, the odds in favour of competitors P, Q, R ...

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  9. In two independent events the probability of happening one event is 2...

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  10. Find the probability of getting tail each time in three tosses of a co...

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  11. Find the probability of getting 3 each time in three throws a dice.

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  12. Find the probability of getting at least one head in three throws of a...

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  13. Find the probability of getting 5 at most 3 times in four throws of a ...

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  14. The probability of happening of an event is 0.6 for one experiment. In...

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  15. A can hit a target 4 times out of 5 trial. B can hit 3 times of 4 tria...

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  16. ‘A’ can hit the target 3 times out of 5 times, ‘B’ can hit 2 times out...

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  17. The probability to pass in an examination of mathematics for three stu...

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  18. The probability of solving a problem by three students are 1/3,1/4,1/5...

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  19. There are 5 red and 7 white balls in one bag and 3 red and 8 white bal...

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  20. There are 5 red and 5 black balls in first bag and 6 red and 4 black b...

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