Draw cumulative frequency curve (0 give) for the following distribution.
The sums of three terms in A.P is 33 and their product is 1155.find the terms.
Marks 5 - 10 10 - 15 15 – 20 20 – 25 25 - 30
Ab.of
students
7 9 12 8 6
Answers
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let the three terms be a-d ,a ,a+d
there sum is given as 33
so a+a-d+a+d =33
3a=33
a=11
also there product is 1155
so 11(11-d)(11+d) = 1155
121-d^2 = 105
d=+4 or -4
so tye three terms are 7 ,11 and 15
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