The ratio of marks obtained by a student in 3 subjects was 1 : 2 : 3. The school decided to allow grace marks of 5% for each subject. Find the student’s new ratio?

1 : 2 : 3
2 : 3 : 4
2 : 3 : 1
3 : 2 : 1

Show answer & explanation

Answer: (A) 1 : 2 : 3

Explanation

A 5% grace on each subject multiplies every mark by the same factor, 1.05: x, 2x, 3x become 1.05x, 2.1x, 3.15x. Multiplying all terms by the same number leaves the ratio unchanged at 1 : 2 : 3.