The ratio of the number of tarts to the number of biscuits in a shop is 6 : 1. A tart costs $1.80 and a biscuit costs $0.40. If all the tarts and biscuits are sold, a sum of $336 will be collected. How many tarts are there altogether?
| |
Tarts |
Biscuits |
Total |
| Number |
6 u |
1 u |
|
| Value |
$1.80 |
$0.40 |
|
| Total value |
10.8 u |
0.4 u |
$336 |
Amount collected if all the tarts are sold
= 6 u x 1.8
= 10.8 u
Amount collected if all the biscuits are sold
= 1 u x 0.4 u
= 0.4 u
Amount collected if all the tarts and biscuits are sold
= 10.8 u + 0.4 u
= 11.2 u
11.2 u = 336
1 u = 336 ÷ 11.2 = 30
Total number of tarts
= 6 u
= 6 x 30
= 180
Answer(s): 180
