The average marks scored by F1 and F2 is 40 more than the average marks scored by F2 and F3. If the mark scored by F3 is 90, then how many marks are obtained by F1?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 170.
According to the question;
⇒ ((F1 + F2)/2) - ((F2 + F3)/2) = 40
⇒ F1/2 + F2/2 - F2/2 - F3/2 = 40
⇒ F1/2 - 90/2 = 40
⇒ F1/2 = 40 + 45
⇒ F1/2 = 85
⇒ F1 = 170