In a post-office, stamps of three different denominations of Rs 7, Rs 8, Rs 10 are available. The exact amount for which one cannot buy stamps is
A. 19
B. 20
C. 23
D. 29
Answer:A
In a post-office, stamps of three different denominations of Rs 7, Rs 8, Rs 10 are available. The exact amount for which one cannot buy stamps is
A. 19 B. 20 C. 23 D. 29