The average marks scored by 8 boys is 72. If the scores of three girls are also included, the average marks increases by 3. The average marks scored by the three girls is:
Answer & explanation
Correct answer: option 2
Let average score of 3 girls = P
ATQ,
8 × 72 + 3 × P = 11 × 75
576 + 3P = 825
3P = 249
P = 83
So , Average marks scored by three girls is 83