Erika, Vanessa and Pamela have 540 marbles. Erika has
45 as many marbles as Vanessa. Pamela's marbles is
15 of the total number of Erika's and Vanessa's marbles. How many marbles must Vanessa give to Pamela so that both Erika and Pamela will have the same number of marbles?
Erika |
Vanessa |
Pamela |
Total |
5x9 = 45 u |
1x9 = 9 u |
|
4x5 = 20 u |
5x5 = 25 u |
|
|
20 u |
25 u |
9 u |
540 |
Total number of marbles
= 20 u + 25 u + 9 u
= 54 u
54 u = 540
1 u = 540 ÷ 54 = 10
Erika |
Vanessa |
Pamela |
Total |
20 u |
25 u |
9 u |
540 |
|
- 11 u |
+ 11 u |
|
20 u |
14 u |
20 u |
540 |
Number of marbles that Vanessa must give to Pamela
= 20 u - 9 u
= 11 u
= 11 x 10
= 110
Answer(s): 110