Given the chart :
how many jars contained more than 15 candies ?
So, from the graph : more than 15 candies , there are 3 bars
16-20 : 6 jars
21-25 : 4 jars
26-30 : 2 jars
So, the number of jars = 6 + 4 + 2 = 12 jars
So, the answer is : 12 jars contained more than 15 candies
B. if a jar with 2 candies was added to the graph
So,
The mean would increase , because the first bar will be 5 jars
so, the sum of the jars will increase by 1, so the mean increase
The answer is : B) the mean would increase