Maths / Arithmetic Progression / Sum of First n Terms

QUESTION
 

The sum of 1st and the last term of an AP of 150 terms is equal to the sum of which of the following two terms?

OPTIONS
A. 

15th and 135th

B. 

20th and 131th

C. 

50th and 51th

D. 

90th and 60th

Right Option : B

EXPLANATION
Explain TypeExplanation Content
Text

In a seies of 150 terms,

a_1+a_1_5_0=a_2+a+a_1_4_9=a_3+a_1_4_8=--------

So,a_2_0+a_1_3_1=a_1+a_1_5_0

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