Question

The average marks obtained by Ronan in 6 subjects is 85 . The marks for 5 subjects are 95,43,72,86 and 55. Find his marks in the 6th subject .

Answer 1

Let the marks in 6th subject be x.

$85 = (95 + 43 + 72 + 86 + 55 + x) / 6$

∴ x = 159.