Question

in a science test the ratio of marks obtained by Raju to Khan to John is 7:5:4.If Khan obtain 12 marks more than John,calculate the total marks obtained by the three of them

Answer 1

Hi ,

Ratio of marks obtained in science

by Raju , Khan and John = 7 : 5 : 4

Sum of the ratio = 7 + 5 + 4 = 16 parts

If Khan obtained 12 more than John

then ,

Difference of the ratio of Khan and

John = 5 - 4 = 1 part

Therefore ,

1 part = 12 marks

Raju marks = 7 parts

= 7 × 12 = 84

Khan marks = 5 parts

= 5 × 12 = 60

John marks = 4 parts

= 4 × 12 = 48

Total marks = 16 parts

= 16 × 12

= 192

I hope this helps you.

:)