If the percentage of Biology teachers is increased by 40% and the percentage of History teachers is increased by 20%, then what will be the total number of Biology and History teachers together?

634

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654

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658

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778

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768

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Solution

The correct option is E 768
Required answer
$= 2000 \times \frac{12}{100} \times \frac{140}{100} + 2000 \times \frac{27}{100} \times \frac{80}{100} = 336 + 432 = 768$

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If the percentage of Biology teachers is increased by 40% and the percentage of History teachers is increased by 20%, then what will be the total number of Biology and History teachers together?

The correct option is E 768Required answer =2000×12100×140100+2000×27100×80100=336+432=768

The correct option is E 768
Required answer
$= 2000 \times \frac{12}{100} \times \frac{140}{100} + 2000 \times \frac{27}{100} \times \frac{80}{100} = 336 + 432 = 768$