PSLEThere are some stickers in albums L and M. 75% of the stickers in album L and 20% of the stickers in album M are square stickers. There is an equal number of oval stickers in both albums. If there are 220 more square stickers in album L than in album M, how many stickers are there in both albums altogether?
L |
M |
Square |
Oval |
Square |
Oval |
3x4 |
1x4 |
1 |
4 |
12 u |
4 u |
1 u |
4 u |
20% =
20100 =
1575% =
75100 =
34The number of oval stickers in both albums is the same. Make the number of oval stickers the same. LCM of 1 and 4 is 4.
Number of more square stickers in Album L than Album M
= 12 u - 1 u
= 11 u
11 u = 220
1 u = 220 ÷ 11 = 20
Number of stickers in both albums
= 12 u + 4 u + 1 u + 4 u
= 21 u
= 21 x 20
= 420
Answer(s): 420