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A number is selected at random from the numbers 1 to 30. What is the probability that the selected number is a prime number?

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The correct Answer is:
C
Prime numbers from 1 to 30 are 2,3,5,7,11,13,17,19,23,29.
Their number is 10.
` :. ` P(getting a prime number) =` 10/30 = 1/3`.
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RS AGGARWAL-PROBABILITY-Multiple Choice Questions (Mcq)
  1. What is the probability of a sure event?

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  2. Which of the following cannot be the probability of an event?

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  3. A number is selected at random from the numbers 1 to 30. What is the ...

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  4. The probability that number selected at random from the numbers 1,2,...

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  5. A box contains cards numbered 6 to 50. card is drawn at random from th...

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  6. A box contains 90 discs, numbered from 1 to 90. If one disc is drawn ...

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  7. Cards bearing numbers 2,3,4,…11 are kept in a bag. A card is drawn at ...

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  8. One ticket is drawn at random from a bag containing tickets numbered 1...

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  9. Which of the following cannot be the probability of an event?

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  10. If the probability of winning a game is 0.4 then the probability of ...

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  11. If an event cannot occur, then its propbability is

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  12. There are 20 tickets numbered as 1,2,3,…,20 respectively. One ticket i...

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  13. There are 25 tickets numbered as 1,2,3,4,…,25 respectively. One ticket...

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  14. Cards, each marked with one of the numbers 6,7,8,…,15, are placed in ...

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  15. A die is thrown once. The probability of getting an even numbers is

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  16. The probability of throwing a number greater than 2 with a fair die i...

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  17. A die is thrown once. The probability of getting an odd number greater...

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  18. A die it thrown once. What is the probability of getting a prime nu...

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  19. Two dice are thrown at the same time. Find the probability of getting ...

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  20. The probability of getting 2 heads, when two coins are tossed, is

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