a) If there are 7 lollies in each bag, and Nicholas buys 10 bags, then the total number of lollies he buys is the product of the number of lollies per bag and the number of bags. So, we can calculate it as:
Total lollies = Number of lollies per bag × Number of bags
Total lollies = 7 lollies/bag × 10 bags
Total lollies = 70 lollies
So, Nicholas buys 70 lollies in total.
b) If there are \( n \) lollies in each bag, and Nicholas buys 10 bags, then the total number of lollies he buys is again the product of the number of lollies per bag and the number of bags. So, we can calculate it as:
Total lollies = Number of lollies per bag × Number of bags
Total lollies = \( n \) lollies/bag × 10 bags
Total lollies = \( 10n \) lollies
So, if there are \( n \) lollies in each bag, Nicholas buys \( 10n \) lollies in total.