Question

In an exam 30% of A marks, 20% of B marks and 40% of C marks are all equal. If the total marks of B and C are 180 then find A marks?

Answer 1

Answer:

80

Step-by-step explanation:

30% of A = 20% of B = 40% of C

3A/10 = B/5 = 2C/5

B = 10C/5 = 2C

B + C = 180 => 2C + C = 180 => C = 60

3A/10 = 2C/5 = 2×60/5

3A = 240 => A = 80 marks