The mean of 2, 5, (x + 2), 7 and 9 is 6. Find the median.
Certainly, I can help with that!
To find the median of a set of numbers, we need to first put them in order from smallest to largest. So, let's arrange the given numbers in ascending order:
2, 5, x+2, 7, 9
The next step is to find the middle value. If there are an odd number of values, the median is simply the middle value. If there are an even number of values, the median is the average of the two middle values.
In this case, we have five numbers, which is an odd number. So, the median is simply the middle value of the ordered set.
To find the middle value, we need to count from either end until we get to the middle. Since there are five numbers, the middle value will be the third one.
2, 5, x+2, 7, 9
The third number is x+2, so that is the median.
Now, we are given that the mean of the five numbers is 6. To find the mean, we add up all the numbers and divide by the total number of numbers:
(2 + 5 + x + 2 + 7 + 9)/5 = 6
(25 + x)/5 = 6
25 + x = 30
x = 5
So, the value of x that makes the mean of the five numbers equal to 6 is 5.
Plugging this value of x back into the original set, we have:
2, 5, 7, 7, 9
The median of this set is the middle value, which is 7.
Therefore, the median of the given set of numbers is 7.
I hope this helps you understand how to find the median of a set of numbers, as well as how to use the mean to solve for missing values in the set!