CGI Company Numerical Ability Area and Volume

A subscriber is allowed to make certain no of telephone calls for a lumpsum charge of Rs 300. Beyond that he is charged at a certain rate per call. Two subscriber together make 1400 calls, and were charged Rs 425 and Rs 925 respectively. If the single person had made all of the 1400 calls, he would have been charged Rs 1550. How many telephone calls are allowed for the first Rs 300 ?

Read Solution (Total 1)

Take "n" as the limit for "Rs. 300".
Case1(When one is using):
per call rate after crossing the limit(i.e n)=(1550-300)/(1400-n)

Case2(When only both are using)
per call rate after crossing the limit(i.e n)=((425+925)-(300*2))/(1400-2n)

so 1250/(1400-n)=750/(1400-2n)
. n=400
9 years agoHelpfull: Yes(28) No(2)

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