Answer:
1.0909...
Explanation:
To find the mean, add all numbers and divide by the number of numbers.
sum = 6 × 5 + 5 × 10 + 3 × 15 + 7 × 20 + 9 × 25 + 7 × 30 + 4 × 35 + 9 × 40 + 3 × 45 + 2 × 50 = 1435
number of numbers = 6 + 5 + 3 + 7 + 9 + 7 + 4 + 9 + 3 + 2 = 55
mean = 1435/55 = 26.0909
There are 55 numbers. The middle number is the 28th number.
The 28th number is 25.
The median is 25.
mean - median = 26.0909... - 25 = 1.0909...