The number of $2, $50 and $100 notes in a piggy bank is in the ratio of 6 : 3 : 1. The notes are worth $1310 altogether. Find the total number of $50 and $100 notes.
| |
$2 |
$50 |
$100 |
Total |
| Number |
6 u |
3 u |
1 u |
|
| Value |
$2 |
$50 |
$100 |
|
| Total value |
12 u |
150 u |
100 u |
$1310 |
Total value of $2, $50 and $100 notes
= 12 u + 150 u + 100 u
= 262 u
262 u = 1310
1 u = 1310 ÷ 262 = 5
Number of $50 and $100 notes
= 3 u + 1 u
= 4 u
= 4 x 5
= 20
Answer(s): 20
