Q. 15)
The number of coins collected per week by two coin-collectors $A$ and $B$ are in the ratio $3: 4$. If the total number of coins collected by $A$ in 5 weeks is a multiple of 7 , and the total number of coins collected by $B$ in 3 weeks is a multiple of 24 , then the minimum possible number of coins collected by $A$ in one week is