Its given that the total bill = 60(1 + x)
= 60 + 60x
So, its clear that the cost of meal is 60 and the percentage of tips is x.
Also, number of friends = (total cost/cost per meal)
[tex]=\frac{60(1+x)}{60}[/tex]
= 1 + x
Hence, the correct match is:
1) - c)
2) - a)
3) - b)