Question

9. Out of a class of 45 students, five were absent, 30% of the remaining had failed to do
homework. Find the number of students who did the homework.
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Answer 1

Answer:

Number of students who did homework = 28

Step-by-step explanation:

Class strength is 45 students

Five were absent, so number of present students were (45 - 5) = 40.

30% of 40 = $\frac{30}{100} . 40$ = 12 failed to do homework.

∴ Number of students who did homework = 40 - 12 = 28