There are four times as many black sweaters as white sweaters in a sale. If there are 155 black and white sweaters altogether,
- how many black sweaters are there?
- how many more black sweaters than white sweaters?
(a)
Number of white sweaters = 1 u
Number of black sweaters
= 4 x 1 u
= 4 u
Total number of sweaters
= 4 u + 1 u
= 5 u
5 u = 155
1 u = 155 ÷ 5 = 31
Number of black sweaters
= 4 u
= 4 x 31
= 124
(b)
Number of more black sweaters than white sweaters
= 4 u - 1 u
= 3 u
= 3 x 31
= 93
Answer(s): (a) 124; (b) 93