Question

Saji obtained 70 and 60 mark in first two examinationations find the minimum mark he should get in third examination to have an average of 50 marks

Answer 1

marks in first exam= 70

             second exam=60

           third exam = x

Average = $\frac{1st exam + 2nd  exam+ 3rd  exam }{3}$

50 = $\frac{70 + 60+ X }{3}$

50*3 = 130+x

150 = 130+x

20 = x