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11 October, 04:57

Becca predicts that 75% of the people she invites to her party will come. If she wants to have at least 21 guests, how many people should she invite to her party?

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  1. 11 October, 05:24
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    Let the total invites be X. Then 0.75X = 21. divide by 0.75:

    X = 21/0.75 = 28
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