A student obtains 75%, 80% and 85% in three subjects.If the marks of another subject is added, then his average cannot be less than
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a
60%
b
65%
c
80%
d
90%
answer is A.
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Detailed Solution
Marks obtained from three subjects out of 300 is 75 + 80 + 85 = 240 If the marks of another subject is added, then the marks will be ≥240 out of 400. .'. Minimum average marks =2404=60% (when marks in the fourth subject is 0)