Mrs Tom baked
12 as many chocolate chip biscuits as cheese biscuits. She also baked
27 as many chocolate chip biscuits as vanilla biscuits. If she baked a total of 78 biscuits, how many chocolate chip biscuits did she bake?
Chocolate Chip |
Cheese |
Vanilla |
1x2 |
2x2 |
|
2x1 |
|
7x1 |
2 u |
4 u |
7 u |
The number of chocolate chip biscuits is the repeated identity. Make the number of chocolate chip biscuits the same. LCM of 1 and 2 is 2.
Total number of biscuits
= 2 u + 4 u + 7 u
= 13 u
13 u = 78
1 u = 78 ÷ 13 = 6
Number of chocolate chip biscuits
= 2 u
= 2 x 6
= 12
Answer(s): 12