Irene bought some bracelets and rings for her friends. The price of each bracelet was $4.30 while the price of each ring was $12.30. For every 5 rings bought, she was given one such bracelet for free. After receiving the free bracelets, the number of bracelets was
13 of the number of rings bought. If Irene paid a total of $772.40, how much more did she pay for the rings than the bracelets?
Rings |
Bracelets |
3x5 |
1x5 |
Bought |
Free |
Bought |
5x3 |
1x3 |
|
15 u |
3 u |
2 u |
|
Rings |
Bracelets |
|
Bought |
Free |
Bought |
Number |
15 u |
3 u |
2 u |
Value |
$12.30 |
0 |
$4.30 |
Total value |
184.5 u |
0 |
8.6 u |
The number of rings bought is the repeated identity. Make the number of rings bought the same. LCM of 3 and 5 is 15.
Cost of the bought rings
= 15 u x 12.30
= 184.5 u
Cost of the bought bracelets
= 2 u x 4.30
= 8.6 u
Total cost of the bought items
= 184.5 u + 8.6 u
= 193.1 u
193.1 u = 772.40
1 u = 772.40 ÷ 193.10 = 4
Amount that she paid more for the rings than the bracelets
= 184.5 u - 8.6 u
= 175.9 u
= 175.9 x 4
= $703.60
Answer(s): $703.60