Penelope, Usha and Gabby have 330 erasers. Penelope has
56 as many erasers as Usha. Gabby's erasers is
15 of the total number of Penelope's and Usha's erasers. How many erasers must Usha give to Gabby so that both Penelope and Gabby will have the same number of erasers?
Penelope |
Usha |
Gabby |
Total |
5x11 = 55 u |
1x11 = 11 u |
|
5x5 = 25 u |
6x5 = 30 u |
|
|
25 u |
30 u |
11 u |
330 |
Total number of erasers
= 25 u + 30 u + 11 u
= 66 u
66 u = 330
1 u = 330 ÷ 66 = 5
Penelope |
Usha |
Gabby |
Total |
25 u |
30 u |
11 u |
330 |
|
- 14 u |
+ 14 u |
|
25 u |
16 u |
25 u |
330 |
Number of erasers that Usha must give to Gabby
= 25 u - 11 u
= 14 u
= 14 x 5
= 70
Answer(s): 70