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Q.

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

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a

7

b

9

c

5

d

4

answer is A.

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Detailed Solution

detailed_solution_thumbnail

72% of 25 students are good at mathematics

Not good at mathematics = 28% of 25 students

                                              = 28100×25 = 7

Therefore, 7 Students are not good at mathematics

 

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