Multiple choice

Meena is a student at a music school. After each performance, she calculates her cumulative average score. In the first 6 performances, her average was 80. Scoring 101 points in Piano increased her average by 3. Scoring 99 points in Guitar further increased her average by 2. If Meena scores 130 in Singing, what will be her average score if Singing was her last performance?

  1. 100

  2. 90

  3. 85

  4. 95
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Initial sum = 6 * 80 = 480. After Piano: (480 + 101) / 7 = 581 / 7 = 83 (increase of 3). After Guitar: (581 + 99) / 8 = 680 / 8 = 85 (increase of 2). After Singing: (680 + 130) / 9 = 810 / 9 = 90.

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