Fiona, Pamela and Bobby baked some biscuits. Fiona and Pamela baked
23 of the biscuits. Pamela and Bobby baked
35 of the biscuits. Fiona and Bobby baked 484 biscuits altogether.
- What fraction of the biscuits did Fiona and Bobby bake altogether?
- How many biscuits did the three girls bake in total?
| Fiona |
Pamela |
Bobby |
Total |
| 2x5 |
1x5 |
3x5 |
| 2x3 |
3x3 |
5x3 |
| 6 u |
4 u |
5 u |
15 u |
(a)
The total number of biscuits the same. Make the total number of biscuits unchanged. LCM of 3 and 5 is 15.
Number of biscuits baked by Pamela
= 9 u - 5 u
= 4 u
Number of biscuits baked by Fiona and Bobby
= 6 u + 5 u
= 11 u
Total number of tarts = 15 u
Fraction of the biscuits baked by Fiona and Bobby =
1115(b)
Total number of biscuits baked by Fiona and Bobby = 11 u
11 u = 484
1 u = 484 ÷ 11 = 44
Total number of biscuits baked
= 15 u
= 15 x 44
= 660
Answer(s): (a)
1115; (b) 660
