Question

Average marks of Rakesh in 6 subjects are 75. If the marks in 5 subjects respectively are 75, 66, 82, 77 and 69, then the marks of the other subject is:

• A. 81
• B. 91
• C. 78
• D. 85
• E. 92

Answer 1

The correct option is A

81

Let the marks of the subject be x.

Average of all subjects = 75 = $\frac{75+66+82+77+69+x}{6}$

=> x = 81