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CBSE Notes 2011-2012

How many terms of an AP must be taken for their sum to be equal to 120 if its third term is 9 and th...

Multiple choice question

How many terms of an AP must be taken for their sum
to be equal to 120 if its third term is 9 and the difference
between the seventh and second term is 20 ?

unknown

6

unknown

7

unknown

8

unknown

9