PSLE Marion has a number of pens in three colours: blue, green and purple.
111 of the pens are blue. The number of blue pens is twice the number of green pens. What fraction of the pens is purple?
Blue |
Green |
Purple |
Total |
1x2 |
10x2 |
11x2 |
2x1 |
1x1 |
|
|
2 u |
1 u |
19 u |
22 u |
Number of blue pens is the repeated identity.
Make the number of blue pens the same.
LCM of 1 and 2 = 2
Number of purple pens
= 22 u - 2 u - 1 u
= 19 u
Fraction of the pens that is purple
=
1922 Answer(s):
1922