EXPLANATION
M15. What is the median of the set: {4, 7, 2, 9, 5}?
a) 2
b) 4
c) 5
d) 7
ANSWER: c) 5
EXPLANATION:
To find the median of a set of numbers, we arrange the numbers in ascending order and then determine the middle value. If the set has an odd number of elements, the median is the middle value. If the set has an even number of elements, the median is the average of the two middle values.
Arranging the set {4, 7, 2, 9, 5} in ascending order:
2, 4, 5, 7, 9
The set has an odd number of elements, so the median is the middle value, which is 5.
Therefore, the median of the set {4, 7, 2, 9, 5} is 5.
