Question
42% of 400 + 38% of 800 + ?2 =
728 What will come in the place of question mark (?) in the given expression?Solution
ATQ, 42% of 400 + 38% of 800 + ?2 = 728 Or, 168 + 304 + ?2 = 728 Or, 472 + ?2 = 728 Or, ?2 = 728 - 472 Or, ?2 = 256 Or, ? = ± 16
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