Therefore to be the integral value x must be 4m; m = 1, 2, 3 ... So, at m = 1 Hence option (a) is correct since B had contributed 1 number. Initial amount
A
B
C
D
7
5
4
0
Final amount
4
4
4
4
3
1
0
∵ B had contributed 1 soda water, therefore B got ₹ 15.