Jaslyn bought some souvenirs for her friends at an average price of $11.40. If Jaslyn decided to buy a pen which cost $16 for her father and a bag which cost $41 for her mother, the average price of the souvenirs would become $17.10. How many souvenirs did Jaslyn buy for her friends?
| |
Friends |
Friends and parents |
| Number |
1 u |
1 u + 2 |
| Value |
11.40 |
17.10 |
| Total Value |
11.40 u |
17.10 u + 34.20 |
Number of souvenirs that Jaslyn bought for her friends = 1 u
Amount that Jaslyn spent on the souvenirs for her friends
= 1 u x 11.40
= 11.40 u
Amount that $(Lizy) spent if she bought for her parents
= 16 + 41
= $57
Total number of items bought if she bought for her parents and her friends
= 1 u + 1 + 1
= 1 u + 2
Total amount that she spent if she bought for her parents and her friends
= 17.10(1 u + 2)
= 17.10 u + 34.20
11.4 u + 57 = 17.10 u + 34.20
17.10 u - 11.4 u = 57 - 34.20
5.7 u = 22.80
1 u = 22.80 ÷ 5.7 = 4
Number of souvenirs that she bought for her friends
= 1 u
= 4
Answer(s): 4
