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72 % of 25 st...

Question

72% of 25 students are good in mathematics. How many are not good in mathematics?

A

3

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B

5

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C

7

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D

9

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Solution

The correct option is C 7
Total number of students = 25
Number of good students in mathematics = 72% of 25
$= \frac{72}{100} \times 25 = 18$
$∴$ Number of students not good in mathematics = 25 - 18 = 7

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