Mary spent
25 of her money on 4 wafers and 10 cookies. If each wafer costs four times as much as a cookie, how many cookies could Mary buy with the rest of her money?
| |
Wafers |
Cookies |
| Number |
4 |
10 |
| Value |
4 u |
1 u |
| Total value |
16 u |
10 u |
Cost of 1 cookie = 1 u
Cost of 1 wafer = 4 u
Total cost of 4 wafers and 10 cookies
= 4 x 4 u + 10 x 1 u
= 26 u
Fraction of Mary's money left
= 1 -
25 =
3525 of Mary's money = 26 u
15 of Mary's money = 26 u ÷ 2 = 13 u
35 of Mary's money = 13 u x 3 = 39 u
Number of cookies that Mary could buy
= 39 u ÷ 1 u
= 39
Answer(s): 39
