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1 November, 16:49

an advertisement claims that 7 out of 8 people prefer brand x. suppose 216 people were interviewed. find the number of people who prefer brand X

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  1. 1 November, 16:59
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    189 people

    Step-by-step explanation:

    We can make a proportion to solve

    We know that 7 out of 8 people prefer Brand X, and p out of 216 people prefer Brand X, so

    7/8=p/216

    To solve, we need to get p by itself.

    To do this, we must multiply both sides by 216 to "reverse" the division being done to p.

    216 (7/8) = (p/216) 216

    189=p

    So, out of 216 people, 189 people will prefer Brand X.
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