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1. If the average of z and x is 35, and the average of x and y is 25, then z-y=?
- A. 5
- B. 5
- C. 5
- D. 5
Answer: Option C
Explanation:
Hints: শর্তমতে,
(z + x)/2 = 35
z + x = 70
(x + y)/2 = 25
x + y = 50
z + x - x - y = 70 - 50
z - y = 20
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