IBPS RRB Office Assistant 21 Sep 2014 Paper

(2) Original price of a mobilephone = Rs. 100 (let)
Number of mobile phonessold = 100
Revenue received = 100 × 100= Rs. 10000
Case II,
New price of a mobile phone= Rs. 80
New number of mobilephones sold = 180
∴ Revenue received= Rs. (80 × 180)
= Rs. 14400
Increase = 14400 – 10000
= Rs. 4400
∴ Percentage increase
=

4400

10000

×100=44%