Mean: 11
Median: 9
Mode: 7
Mean is when you add up all of the numbers, then you take the sum you get and divide by the amount of numbers you have. So in this case, it’d be 154 (the sum) divided by 14 (the amount of numbers you have).
Median is when you put all of your numbers in ascending order and then find the middle number. In this case, the amount of numbers we had were even, so the middle numbers were 8 and 10. In between of these two numbers, is the number 9. So as a result, 9 is your answer.
Mode is the number that you see the most in a set of number. In this case, 7 is repeated 3 times, unlike other numbers, which happens to be the most. So, 7 is your answer for the mode.
Answer: There are 26 trees which they chop down .
Explanation:
Since we have given that
the number of trees they chop down is given by

Where 'b' denotes number of hours Ben spends chopping,
'c' denotes number of hours Cam spends chopping,
'j' denotes number of hours Justin spends chopping.
Now, we have also given that,
Number of hours Ben spends chopping = 8
Number of hours Cam spends chopping = 3
Number of hours Justin spends chopping = 4
Now, we put the value of all these variable in the above expression ,we'll get

Hence, there are 26 trees which they chop down .