Percentage Practice Test 1 with solutions

Question : 17 of 40

Marks: +1, -0

72% of the students of a certain class took Biology and 44% took Mathematics. If each student took at least one subject from Biology or Mathematics and 40 took both, then total number of students in the class is:

Validate

Solution:

Percentage of students who took both the subjects = (72 + 44) – 100 = 16%
Now, 16% = 40

∴100%=40/16×100=250

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