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The probability to pass in an examinatio...

The probability to pass in an examination of mathematics for three students are `1/4,1/5,1/6`. Find the probability that at least two students will pass in this examination.

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`13/120`
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NAGEEN PRAKASHAN ENGLISH-PROBABILITY-EXERCISE
  1. A can hit a target 4 times out of 5 trial. B can hit 3 times of 4 tria...

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

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

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

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

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

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  7. There are 4 white and 3 black balls in a bag. Find the probability of ...

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  8. There are 8 white and 7 black balls in a bag . Three balls are drawn t...

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  9. Two cards drawn without replacement from a well shuffled pack of 52 ca...

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  10. (i) There are 100 bulbs in a box, out of which 10 are defective. In a ...

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  11. In one toss of a coin, find the probability of getting: (i) head (ii...

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  12. In one toss of two coins together find the probability of getting: ...

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  13. In one toss of three coins together, find the probability of getting: ...

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  14. In one throw of a dice, find the probability of getting: (i) an even...

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  15. In one throw of two dice together, find the probability of getting: ...

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  16. In one throw of three dice together, find the probability of getting: ...

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  17. A card is drawn from a well shuffled pack of cards. Find the probabi...

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  18. There are two children in a family. Find the probability that at most ...

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  19. There are 7 red, 5 black and 3 white balls in a bag. A ball is drawn a...

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  20. There are 12 tickets numbered 1 to 12. A ticket is drawn at random. Fi...

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