Rohan scored 70 and 75 marks in the first two tests. How many marks should he score in the third test to get an average of 70 marks ?
Answer & explanation
Correct answer: option 4
Let marks scored in 3rd test = A
ATQ,
70 + 75 + A = 3 × 70
145 + A = 210
A = 65
So , Marks scored in 3rd test is 65