Answer: (B) 20 or (C) 24 depending on which number was erased
Step-by-step explanation:
The median is the middle number of the set in order from least to greatest
{18, 30, 26, 12, 22}
First, put the set in order from least to greatest: {12, 18, 22, 26, 30}
Next, find the middle number by crossing out the end numbers:
The median of the given set is 22. Since a number was erased, then the median has to be the average of the two middle numbers.
If the erased number is on the left side {?, 12, 18, 22, 26, 30}, then the median is the average of 18 and 22, which is 20
If the erased number is on the right side {12, 18, 22, 26, 30, ?}, then the median is the average of 22 and 26, which is 24