A bag contains 5 red balls, x blue balls. If the probability of choosing a black ball at random is 9/20.find the value of x

Question

A bag contains 5 red balls, x blue balls. If the probability of choosing a black ball at random is 9/20.find the value of x

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Xavia 4 years 2021-09-04T02:03:13+00:00 1 Answers 5 views 0

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  1. Ladonna
    0
    2021-09-04T02:04:16+00:00
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    Probability of choosing black ball is 9 out of 20 total balls.

    There are 5 red balls and x blue balls.

    So,

    9 + 5 + x = 20 balls

    14 + x = 20 balls

    x = 20 – 14

    x = 6 balls

    x = 6

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