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1. In an examination of four subjects, a student got 70,80, 90 and x marks and his average was 75. What was the value of x?
- A. 60
- B. 60
- C. 60
- D. 60
Answer: Option A
Explanation:
Here, 70 + 80 + 90 + x = 4 x 75
or, x = 300 - 240
So, x = 60
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