(d) Total strength = 60Average marks in Math’s = 45Average marks in Biology = 60 (Combined Averagemarks =50)Let the no. of students in Maths & Biology are in the ratio x :ySox : y= 60-50 : 50-45 = 10 : 5 ⇒ 2 :1So let’s make venn diagram:
Since Math has twice the number of students as Biology. So Math’s has 30 & Biology has 15 people. Hence Physics only can have maximum 60 - (30 + 15)= 15 people.
