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A teacher chooses a student at random from a class of 30 boys. What is the probability that the student chosen is a boy?

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ARIHANT SSC-PROBABILITY-EXERCISE (LEVEL-2)
  1. A teacher chooses a student at random from a class of 30 boys. What is...

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  2. What is the probability that four S's come consecutively in the word M...

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  3. If a sum of money double itself in 4 years at S.I. then the rate of in...

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  4. Nutan invest rs. 22400 on S.I. at the rate of 12% p.a. How much amount...

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  5. a consignment of 15 record players contain 4 defectives .the record pl...

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  6. In a test, an examinee either guesses or copies or knows the answer to...

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  7. Given that the sum of two - negative quanties is 200 , the pr...

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  8. A pack of cards consists of 15 cards numbered 1 to 15. Three cards are...

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  9. What time taken by sum of rs.7000 to become rs.10500 at the rate of 5%...

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  10. The difference between C.I. and S.I. at a certain rate on rs. 2000 at ...

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  11. The probabilities that a student passes in Mathematics, Physics and Ch...

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  12. A student appears for tests I. II and III. The student is considered s...

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  13. If (1 +3p )/( 3 ) , (1-p )/(4) , (1- 2p )/( 2) are probabilities o...

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  14. A letter is takenout at random from 'ASSISTANT and another is taken ou...

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  15. A sum of money doubles in 3 years at compound interest compounded annu...

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  16. A man takes a step forward with probability 0.4 and back ward with pro...

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  17. Three of the six vertices of a regular hexagon are chosen at random. T...

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  18. What is the difference between C.I. and S.I. of rs.12000 on 5% p.a. fo...

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  19. Urn A contains 6 red and 4 black balls and urn B contains 4 red and 6 ...

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  20. The digits 1,2,3,....,9 are written in random order to form a nine dig...

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