Answer:
Concept: Unit Conversion and Application 
- 1 apple = 225 gram 
 - 225 grams to kg = 0.225 
 - Remember there are 1000 grams in a kg 
 - Hence we want to know how many apples make up 1.5 kg 
 - 1.5/0.225=6.66 apples 
 - But we must be conservative to not underproject 
 - Hence 7 apples