qp999333 發問於 科學及數學數學 · 8 年前

Probablilty (Math)

The chances of three independent events happening is 1/4th, 1/3rd, and 3/4th respectively. What is the possibility that at least two of the above events happening? Please thoroughly explain.

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  • 8 年前
    最愛解答

    The probability that 2 of the above events happening

    =(1-1/4)x1/3x3/4+1/4x(1-2/3)x3/4+1/4x1/3x(1-3/4)

    =13/48

    The probability that 3 of the above events happening

    =1/4x1/3x3/4

    =1/16

    The possibility that at least two of the above events happening

    =13/48+1/16

    =1/3

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