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scottydog
scottydog asked in Science & MathematicsMathematics · 1 decade ago

i have 640 red balls and 60 white ones. whats the probability of me picking a red ball?

8 Answers

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  • M
    Lv 7
    1 decade ago
    Favorite Answer

    BINOMIAL PROBABILITY - ANSWER: 36.7% PROBABILITY PICKING RED BALL

    (700!) / [1! * (700 - 1)!] * (1/640)^1 * (1 - 1/640)^(700-1) = 700 * 0.001563 * 0.335195 = 0.36662 (approx 36.7%)

  • Como
    Lv 7
    1 decade ago

    P (red) = 640 / 700 = 64 / 70 = 32 / 35

  • Anonymous
    1 decade ago

    total number of balls = 700

    chance of red = 640/700 = 32/35

  • curious me
    1 decade ago

    to get the probability you need to divide the number of the balls you pick by the total balls from which you're picking.

    so it is:

    640/(640+60)=

    640/700= 0.9143.... or 91.43%

    the probability of you picking a red ball is 0.9143 or 91.43%.

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  • Anonymous
    1 decade ago

    640/700

  • Pulse
    1 decade ago

    An answer suitable for an exam paper

    640/700

    Therefore, 32/35

  • macdylan4
    1 decade ago

    640 / 60 = 10.67

    10.67 to one.

    or round up to 11 to 1 chance.

  • Anonymous
    1 decade ago

    approx 10.5 to one

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