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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: |
95 83 78 68 |
83 |
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 |
