1.

If a_1 , a_2 , a_3, … is an A.P. such that a_1 , a_5 , a_(10) , a_(15) , a_(20) , a_(24) = 225 then a_1 + a_2 + a_3 + … + a_(23) + a_(24) is equal to :

Answer»

a. 999
B. 900
c. 1225
d. NONE of these

Answer :B


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