In nine games, A wins five games with score differences of 12, 3, 8, 4 and 1, while in the remaining four games, he loses with score differences of –4, –1, –2 and –3. The average score difference of A in all the nine games is:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 2.
Average score difference = Total score difference / Number of games
Total score difference = 12 + 3 + 8 + 4 + 1 - 4 - 1 - 2 - 3
⇒ Total score difference = 18
Number of games = 9
Average score difference = Total score difference / Number of games
⇒ Average score difference = 18 / 9
⇒ Average score difference = 2