In a course a student gets grade C if
his average in four test is between
50 and 60. Find the range of score X
on the fourth test to ensure a grade C
given that:
(a) A student scores 65% , 55%, and
45% in the first three test.
(b) A student score 70%, 60% and
55% on the first three test.
(c) A student score 60% , 50% and
40% of the first three test.
ase how do we solve such question
I need help
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