Question

Rohan wrote a total of 10 tests. His average mark in those was 100. His average mark in the first nine tests was 90. Find his mark in the tenth test.
1. 290
2. 100
3. 190
4. 160

Answer 1

Correct Answer - Option 3 : 190

CALCULATION:

Average marks in 10 subjects = 100

⇒ Total marks in 10 subjects = 1000

Average marks in 9 subjects = 90

⇒ Total marks in 9 subjects = 810

⇒ Marks in 10^th subject = 190