Question

In the expression xy, the values of both variables x and y are decreased by 20%. By this, the valueof the expression is decreased by
(1) 40%
(2) 80%
(3) 48.8%
(4) 51.2%​

Answer 1

Answer:

$20 + 20 + \frac{20 \times 20}{100} \\ = 40 + 4 \\ = 44$

Answer 2

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