PSLEThere are some stickers in albums C and D. 75% of the stickers in album C and 20% of the stickers in album D are square stickers. There is an equal number of round stickers in both albums. If there are 209 more square stickers in album C than in album D, how many stickers are there in both albums altogether?
C |
D |
Square |
Round |
Square |
Round |
3x4 |
1x4 |
1 |
4 |
12 u |
4 u |
1 u |
4 u |
20% =
20100 =
1575% =
75100 =
34The number of round stickers in both albums is the same. Make the number of round stickers the same. LCM of 1 and 4 is 4.
Number of more square stickers in Album C than Album D
= 12 u - 1 u
= 11 u
11 u = 209
1 u = 209 ÷ 11 = 19
Number of stickers in both albums
= 12 u + 4 u + 1 u + 4 u
= 21 u
= 21 x 19
= 399
Answer(s): 399