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Q:
A) 25 | B) 50 |
C) 75 | D) 100 |
Answer: C) 75
Explanation:
Explanation:
Let the number of students in the class be 100 and let this required average be x.
Then, (10 * 95) + (20 * 90) + (70 * x) = (100 * 80)
=> 70x = 8000 - (950 + 1800) = 5250
=> x = 75.