There are thrice as many black vests as yellow vests in a sale. If there are 180 black and yellow vests altogether,
- how many black vests are there?
- how many more black vests than yellow vests?
(a)
Number of yellow vests = 1 u
Number of black vests
= 3 x 1 u
= 3 u
Total number of vests
= 3 u + 1 u
= 4 u
4 u = 180
1 u = 180 ÷ 4 = 45
Number of black vests
= 3 u
= 3 x 45
= 135
(b)
Number of more black vests than yellow vests
= 3 u - 1 u
= 2 u
= 2 x 45
= 90
Answer(s): (a) 135; (b) 90