Question
Frequencies of the classes are plotted by dots against
the mid-points of each class and then the adjacent dots are connected by straight lines be called?Solution
Frequencies of the classes are plotted by dots against the mid-points of each class. The adjacent dots are then connected by straight lines. The resultant graph is known as “ frequency polygon” .
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18 × 15 + 86 – 58 = ? + 38
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