Barbara spent
25 of her money on 8 tarts and 6 cookies. If each tart costs twice as much as a cookie, how many cookies could Barbara buy with the rest of her money?
| |
Tarts |
Cookies |
| Number |
8 |
6 |
| Value |
2 u |
1 u |
| Total value |
16 u |
6 u |
Cost of 1 cookie = 1 u
Cost of 1 tart = 2 u
Total cost of 8 tarts and 6 cookies
= 8 x 2 u + 6 x 1 u
= 22 u
Fraction of Barbara's money left
= 1 -
25 =
3525 of Barbara's money = 22 u
15 of Barbara's money = 22 u ÷ 2 = 11 u
35 of Barbara's money = 11 u x 3 = 33 u
Number of cookies that Barbara could buy
= 33 u ÷ 1 u
= 33
Answer(s): 33
