Irene has 3 times as many coins as Usha. Usha has
47 as many coins as Xuan. If the three of them have a total of 276 coins, how many coins does Irene have?
Irene |
Usha |
Xuan |
3x4 |
1x4 |
|
|
4x1 |
7x1 |
12 u |
4 u |
7 u |
The number of coins that Usha has is repeated. Make the number of coins that Usha has the same. LCM of 1 and 4 is 4.
Total number of coins that the three of them have
= 12 u + 4 u + 7 u
= 23 u
23 u = 276
1 u = 276 ÷ 23 = 12
Number of coins that Irene has
= 12 u
= 12 x 12
= 144
Answer(s): 144