If the class intervals in a frequency distribution are (72−73.9),(74−75.9),(76−77.9),(78−79.9), the mid-point of the class (74−75.9) is
74.50
74.90
74.95
75.00
A
74.90
B
74.95
C
75.00
D
74.50
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Solution
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⇒ We have to find mi-point of class interval between (74−75.9
Upper class limit =75.9
Lower class limit =74
Mid-point of class =Upperlimit+Lowerlimit2
=75.9+742
=149.92
=74.95
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