Correct Answer: E
Explanation:
Arithmetic operations
- (1) This does not give any information as to the call's cost per minute; NOT sufficient.
- (2) From this, it can be determined only that the call was longer than one minute and that the charge for the first minute was $0.50 more than the charge for each succeeding minute;NOT sufficient.
Taking (1) and (2) together, the number of minutes cannot be determined as long as the
cost of each minute after the first is unknown.For example, if the cost of each minute after the
first minute were $0.40, then the cost of the first minute would be $0.90. Then the total cost of the
other minutes would be $6.50 - $0.90 = $5.60, and $5.60+ $0.40 would yield 14. In this case,
the time of the call would be 1 +14 = 15 minutes. If, however, the cost of each minute after the first
minute were $0.15, then the cost of the first minute would be $0.65. Then $6.50 - $0.65 would be $5.85, and this in turn, when divided by $0.15,would yield 39 minutes, for a total call
length of 40 minutes. More information on the cost of each minute after the first minute is still
needed.
The correct answer is E; both statements together are still not sufficient.
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