Answer:
42
Explanation:
The chart shows how many bags have a certain number of sweets (e.g. 3 of the 9 bags have 39 sweets). To calculate how many sweets there are in the 10th bag, set up an equation where
represents the number of sweets in the 10th bag:

41 is the mean, which you get by adding the number of sweets in each bag together and dividing it by the number of bags.
Simplify the equation:


Multiply both sides by 10:

Isolate the variable:
