PSLE Zeph kept pens in boxes N and P. Box N contained thrice as many pens as box P. In box N,
15 of the pens were blue pens. In box P,
14 of the pens were blue pens. What fraction of Zeph's pens were blue pens?
Box N |
Box P |
Total |
3x4x5 |
1x4x5 |
4x4x5 |
B |
Not blue |
B |
Not blue |
|
1x12 |
4x12 |
1x1x5 |
3x1x5 |
|
12 u |
48 u |
5 u |
15 u |
80 u |
LCM of 5 and 12 is 60.
Number of blue pens
= 12 u + 5 u
= 17 u
Total number of pens = 80 u
Fraction of Zeph's pens that were blue =
1780 Answer(s):
1780