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Q.
Vinod have 20 rupees. He bought 1, 2, 5 rupee stamps. They are different in numbers by the reason of no change, the shop keeper gives 3 one rupee stamps. So how many stamps Vinod have ?
A.
10
B.
18
C.
12
D.
15
View Answer
Correct choice: A
Explanation:
Given total rupees = 20 Rs No. of one rupee stamps = 3 Now, remaining money = Rs. 17 With that he buys only 2 and 5 rupee stamps Let number of Rs. 5 stamps = K Let number of Rs. 2 stamps = L 5K + 2L = 17 K = 3, L = 1 (possible) L = 6, K = 1 (possible) => But given that they are different in number so, K is not equal to 3 one rupee stamps = 3 2 two stamps = 6 5 rupee stamps = 1 Total number of stamps = 10.
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