Mathematics · Averages
Let A, B, C, D represent the marks of four students respectively. If the average of A, B, C is 1013; B, C, D is 1323; C, D, A is 1213; and D, A, B is 1123; then 5(C - B) =
- 1D - A✓
- 22A - D
- 33(D - A) - (B + C)
- 4D + A - B - C
Correct answer
D - A
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