Flynn had some coins. 36% of his coins were made up of 50-cent coins which was equal to the number of $1 coins. The rest of the coins were made up of 20-cent coins. Given that Flynn had $31 more 50-cent coins than 20-cent coins, how many coins did Flynn have altogether?
| |
20-cent |
50-cent |
$1 |
Total |
| Number |
7 u |
9 u |
9 u |
25 u |
| Value |
20 |
50 |
100 |
|
| Total value |
140 u |
450 u |
900 u |
|
36% =
36100 =
925The number of 50-cent coins and $1 coins is the same.
Number of 20-cent coins
= 25 u - 9 u - 9 u
= 7 u
$1 = 100¢
$31 x 100 = 31 x 100 = 3100¢
Number of more 50-cent coins than 20-cent coins
= 450 u - 140 u
= 310 u
310 u = 3100
1 u = 3100 ÷ 310 = 10
Total number of coins that Flynn had
= 7 u + 9 u + 9 u
= 25 u
= 25 x 10
= 250
Answer(s): 250
