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The probability of selecting a rotten randomly from a heap of 900 apples is 0.18. What is the number of rotten apples in the heap ?

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The probability of selecting a rotten apple randomly from a heap of 900 apples is 0.18. What is the number of rotten apples in the heap?

The probability of selecting a rotten apple randomly from a heap of 900 apples is 0.18 . What is the number of rotten apples in the heap?

Knowledge Check

  • The probability that bulbs selected randomly from the lot has life less than 900 h, is

    A
    `11/40`
    B
    `5/16`
    C
    `7/16`
    D
    `9/16`

  • The number of ways of selecting exactly 4 fruits out of 4 apples, 5 mangoes, 6 oranges is

    A
    10
    B
    15
    C
    20
    D
    25

  • When in each box 5 or 6 dozens of apples were packed,three dozens were left.Therefore,bigger boxes were taken to pack 8 or 9 dozens of apples. However, still three dozens of apples remained. What was the least number of dozens of apples to be packed?

    A
    363 dozens
    B
    315 dozens
    C
    345 dozens
    D
    335 dozens

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    Find the probability of an odd number selected randomly from first 30 natural numbers.

    Four rotten oranges are accidentally mixed with 16 good ones. Three oranges are drawn at random from the mixed lot. Let X be the number of rotten oranges drawn. Find the mean and variance of X.

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