PSLE At first, Mary had 61 beads and some coins. After she gave away 22 beads and 40% of the coins, she had a total of 69 beads and coins. How many coins did Mary give away?
|
Beads |
Coins |
Total |
Before |
61 |
5 u |
|
Change |
- 22 |
- 2 u |
|
After |
39 |
3 u |
69 |
40% =
40100 =
25 Number of beads that Mary left
= 61 - 22
= 39
Number of coins that Mary left
= 69 - 39
= 30
3 u = 30
1 u = 30 ÷ 3 = 10
Number of coins that Mary gave away
= 2 u
= 2 x 10
= 20
Answer(s): 20