Question 69

75% of the students passed in an examination. If 2 more students had passed the examination, 80% would have been successful. How many students are there in the class?

Solution

$$5\ \%\ \longrightarrow\ 2$$

$$1\%\ \longrightarrow\ \ \frac{\ 2}{5\ \%\ }$$

$$100\%\ \longrightarrow\ \ \frac{\ 2}{5\ \%\ }\times\ 100\ \%\ =40$$

Hence option 'A' is correct.

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