Mr. Pang employed some plumbers and painters for his construction site. A painter was paid $7 a day and a plumber was paid $17 a day. Given that he employed 3 times as many plumbers as painters and a total of $116 was paid to these workers for the day, how many less plumbers than painters did Mr. Pang employ for his site?
|
Plumbers |
Painters |
Difference |
Total |
Number |
3 u |
1 u |
2 u |
|
Value |
17 |
7 |
|
|
Total value |
51 u |
7 u |
|
58 u |
Number of painters = 1 u
Number of plumbers = 3 x 1 u = 3 u
Total amount paid
= (3 u x 17) + (1 u x 7)
= 51 u + 7 u
= 58 u
58 u = 116
1 u = 116 ÷ 58 = 2
Number of less painters than plumbers
= 3 u - 1 u
= 2 u
= 2 x 2
= 4
Answer(s): 4