18. The mean of the following frequency distribution is 62.8 and the sum
frequencies is 50. Compute the missing frequency fi and f2.
Class: 0 - 20 20 - 40 40 - 60 60 - 80 80 - 100 100 - 12
Frequency: 5
f
10 f
7
8 [CBSE 2004)
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that the perpendiculars drawn from the vertices of the base of an isosceles triangle to the opposite sides are equal. Answer: Given:
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