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Cards marked with numbers 3, 4, 5, ........

Cards marked with numbers 3, 4, 5, ......, 50 are placed in a box and mixed thoroughly. One card is drawn at random from the box. Find the probability that number on the drawn card is

Text Solution

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The correct Answer is:
Total cards = 50 – 3 + 1 = 48
No. divisible by 7 are `7, 14, 21, 28, 35, 42, 49`
Required probability `=(7)/(48)`
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Knowledge Check

  • Cards marked with the numbers 2 to 101 are placed in a box and mixed thoroughly. One card is drawn from this box. Find the probability that the number on the card is a perfect square.

    A
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    B
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    C
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    D
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