Rashed's average on 4 tests is 80. Assuming he can earn no more than 100 on any test, what is the least he can earn on his 5th test and still have a chance for an average of 85 after seven tests ?
A. 60
B. 70
C. 75
D. 85
E. None of these
সঠিক উত্তরঃ
C.
75
Explanation:
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