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A box contains 90 discs which are number...

A box contains 90 discs which are numbered from 1 to 90. If one disc is drawn at random from the box, find the probability that it bears (i) a two-digit number, (ii) a number divisible by 5.

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The correct Answer is:
No.s divisible by 5
`5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90`
Required probability `=(18)/(90)=(1)/(5)`
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CBSE COMPLEMENTARY MATERIAL-PROBABILITY-LONG ANSWER TYPE QUESTIONS
  1. A box contains 90 discs which are numbered from 1 to 90. If one dis...

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  2. A box contains 90 discs which are number from 1 to 90 . If one disc i...

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  3. A box contains 90 discs which are numbered from 1 to 90. If one disc i...

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  4. A card is drawn at randown from a well shuffled deck of playing cards....

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  5. A card is drawn at randown from a well shuffled deck of playing cards....

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  6. A card is drawn at random from a well shuffled deck of playing cards. ...

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  7. A card is drawn at randown from a well shuffled deck of playing cards....

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  8. A card is drawn from a well shuffled deck of playing cards. Find the p...

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  9. A card is drawn from a well shuffled deck of playing cards. Find the p...

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  10. A card is drawn from a well shuffled deck of playing cards. Find the p...

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  11. Ramesh got Rs24000 as Bonus. He donated Rs5000 to temple. He gave Rs1...

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  12. Ramesh got Rs24000 as Bonus. He donated Rs5000 to temple. He gave Rs1...

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  13. Ramesh got Rs24000 as Bonus. He donated Rs5000 to temple. He gave Rs1...

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  14. 240 students reside in a hostel. Out of which 50% go for the yoga clas...

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  15. A box contains cards numbered from 11 to 123. A card is drawn at rando...

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  16. A box contains cards numbered from 11 to 123. A card is drawn at rando...

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  17. A die is thrown twice. Find the probability that: 5 will come up at ...

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  18. A die is thrown twice. Find the probability that: 5 will not come up...

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  19. Cards marked 1, 3, 5 .... 49 are placed in a box and mixed thoroughly....

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  20. Cards marked 1, 3, 5 .... 49 are placed in a box and mixed thoroughly....

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