Risa spent
38 of her money on 5 scones and 7 biscuits. If each scone costs four times as much as a biscuit, how many biscuits could Risa buy with the rest of her money?
| |
Scones |
Biscuits |
| Number |
5 |
7 |
| Value |
4 u |
1 u |
| Total value |
20 u |
7 u |
Cost of 1 biscuit = 1 u
Cost of 1 scone = 4 u
Total cost of 5 scones and 7 biscuits
= 5 x 4 u + 7 x 1 u
= 27 u
Fraction of Risa's money left
= 1 -
38 =
5838 of Risa's money = 27 u
18 of Risa's money = 27 u ÷ 3 = 9 u
58 of Risa's money = 9 u x 5 = 45 u
Number of biscuits that Risa could buy
= 45 u ÷ 1 u
= 45
Answer(s): 45
