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Q.

What is the class mark of the class 50 - 100?


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a

75

b

110

c

120

d

140 

answer is A.

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Detailed Solution

Given class is 50 - 100.
The class marks of a class always mean of the lower limit and the upper limit.
Hence, the class marks is 50 + 1002 = 75.
So, option 1 is correct.
 
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