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A customer using a certain telephone calling plan pays a [#permalink]
21 Dec 2003, 21:15
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A customer using a certain telephone calling plan pays a fees of $25 per month, and then receives a discount of 40% on the regular charge for all calls made to country A. If calls to country A are regularly charged at $1.60 per minute for the first 3 mins, and $0.80 per minute for each minute thereafter, what is the maximum the customer could have saved over regular prices if he was charged for 1 hr of calls made to country A in a certain month?
>>>>> Please explain how you get the Ans. My ans is not in the choices given in the question.
Sorry for the typo. it was 80 cents. [\b]
Last edited by bat_car on 22 Dec 2003, 20:34, edited 1 time in total.
my solution: If the customer calls for less than 3 min every time the max charge is 60x1,6=96$ , when the customer uses this plan he pays 25$+60% of the calls to country A. 60%x96$=57,6$+25$=82,6 $ , so when he is not using the plan he pays 96 max, the saving then are 96$-82,6$=13,4$ or C)
80c / min is there just to confuse you. What you really need is the MAX amount that could be saved between the two plans. Therefore, you only need to calculate how many 3 min. call at 1.6 / min you can make so as to save the most. _________________