PSLEThere are some stickers in albums B and C. 80% of the stickers in album B and 20% of the stickers in album C are round stickers. There is an equal number of oval stickers in both albums. If there are 315 more round stickers in album B than in album C, how many stickers are there in both albums altogether?
B |
C |
Round |
Oval |
Round |
Oval |
4x4 |
1x4 |
1 |
4 |
16 u |
4 u |
1 u |
4 u |
20% =
20100 =
1580% =
80100 =
45The 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 round stickers in Album B than Album C
= 16 u - 1 u
= 15 u
15 u = 315
1 u = 315 ÷ 15 = 21
Number of stickers in both albums
= 16 u + 4 u + 1 u + 4 u
= 25 u
= 25 x 21
= 525
Answer(s): 525