Question
A student has two types of markers: Marker A priced at
$3 each and Marker B priced at $5 each. If the student purchases a total of 12 markers, with an average cost of $4 per marker, how many of each type did the student buy?Solution
Let x be the number of Marker A and 12−x be the number of Marker B. By alligation method- Ratio of marker A to marker B = (5-4): (4-3) = 1: 1 Which means the student buys 6 markers of A, and 6 markers of B.
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