10 * 150 = 1500
2 * 100 + 5 * 150 = 950
1500 – 1050 = 550
A man purchased 2 blankets @ Rs.100 each, 5 blankets @ Rs.150 each and two blankets at a certain rate which is now slipped off from his memory. But he remembers that the average price of the blankets was Rs.150. Find the unknown rate of two blankets?
[a] 278
[b] 277
[c] 278
[d] 450
[e] 550