Mr. Ma employed some painters and plumbers for his construction site. A plumber was paid $7 a day and a painter was paid $15 a day. Given that he employed 4 times as many painters as plumbers and a total of $201 was paid to these workers for the day, how many more painters than plumbers did Mr. Ma employ for his site?
|
Painters |
Plumbers |
Difference |
Total |
Number |
4 u |
1 u |
3 u |
|
Value |
15 |
7 |
|
|
Total value |
60 u |
7 u |
|
67 u |
Number of plumbers = 1 u
Number of painters = 4 x 1 u = 4 u
Total amount paid
= (4 u x 15) + (1 u x 7)
= 60 u + 7 u
= 67 u
67 u = 201
1 u = 201 ÷ 67 = 3
Number of more painters than plumbers
= 4 u - 1 u
= 3 u
= 3 x 3
= 9
Answer(s): 9