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A box contains 20 cards marked with the...

A box contains 20 cards marked with the number 1 to 20 . One card
is drawn from this box at random. What is the probability of the following events : The number on the card is a prime number

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The correct Answer is:
`(2)/(5)`
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TARGET PUBLICATION-PROBABILITY-(Based on Practice Set 5.4)
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  2. A card is drawn at random from well-shuffled pack of 52 cards. Find ...

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  5. A box contains 5 strawberry chocolates, 6 coffee chocolates and 2 pepp...

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  6. A box contains 5 strawberry chocolates, 6 coffee chocolates and 2 pepp...

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  8. In a cricket team there are 6 batsmen 4 bowlers and 1 wicketkeeper. O...

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  9. A bag contains 3 yellow, 4 blue and 5 white balls. One ball is drawn...

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  10. A beg contains 3 yellow, 4 blue and 5 white balls. One ball is drawn...

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  11. A bag contains 3 yellow, 4 blue and 5 white balls. One ball is drawn...

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  13. There are 40 tickets numbered 1 to 40 in a box. A ticket is drawn. ...

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  14. A box contains 20 cards marked with the number 1 to 20 . One card ...

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  15. A box contains 20 cards marked with the number 1 to 20 . One card ...

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  16. There are three boys and two girls. A committee of two is to be form...

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  18. Two-digit numbers are formed from the digits 0,1,2,3,4 where the dig...

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  19. The probability of passing in an exam for Ramesh, Jay, Sunil are (3...

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  20. In a certain race there are three boys A, B, C. The winning probabil...

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