At a certain store, each notepad costs x dollars and each marker costs y dollars. If $10 is enough to buy 5 notepads and 3 markers. Is $10 enough to buy 4 notepads and 4 markers ??geet_ge wrote:Please help me understand why 20/11 = y (price of one marker) is not sufficient for the solution?
If 5x + 3y ≤ 10, then is 4x + 4y ≤ 10?
(1) Each notepad costs less than $1 implies it could be any value less than $1; NOT sufficient.
(2) $10 is enough to buy 11 notepads implies 11x < 10 or x < 10/11, almost same as statement 1; NOT sufficient.
Combining (1) and (2), if the cost of notepad is less, then 4x + 4y ≤ 10 would be true but if in case the cost of a notepad is $0.1 and cost of marker is $3, then 4x + 4y ≥ 10. No definite answer; NOT sufficient.
The correct answer is E.
