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Question

If 15 out of 20 students passes in a test, the percentage of students passing the exam is %

A
65
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B
70
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C
75
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D
80
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Solution

The correct option is C 75
You know,
Percent is expressed per 100.
x% means x parts per 100 parts
Passed Total number of students
15 20
? 1

You can find value by:
= 15×120=1520=0.75

This denotes 0.75 parts per 1 part(unit rate)
Multiplying unit rate by 100 you get,
0.75 × 100=75 parts per 100 part.

∴ Percentage of students who passed the exam is 75%.

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