एक अखबार विक्रेता पहले दिन (80) अखबार बेचता है और हर अगले दिन (10) अखबार अधिक बेचता है। (9)वें दिन कितने अखबार बिकेंगे?
A newspaper seller sells (80) newspapers on the first day and (10) more newspapers each next day. How many newspapers are sold on the (9)th day?
Explanation opens after your attempt
C. (160)
Concept
The newspaper sales form an AP. (a_9=80+8(10)=160).
Why this answer is correct
The correct answer is C. (160). The newspaper sales form an AP. (a_9=80+8(10)=160).
Exam Tip
अखबारों की बिक्री समान्तर श्रेणी है। (a_9=80+8(10)=160)।
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