Answer :
Answer:
B
Step-by-step explanation:
The median is the middle number of the set, arranged in ascending order, smallest to largest.
the set of numbers in ascending order is
3 , 7 , 9 , 15 , 21
↑ middle number
median = 9
Step-by-step explanation:
To find the median of a set of numbers, you need to arrange the numbers in either ascending or descending order and then find the middle value.
Given the set of numbers: 3, 7, 9, 15, 21
When arranged in ascending order: 3, 7, 9, 15, 21
Since the set has an odd number of values, the median is the middle number when the values are in order. In this case, the median is 9.
Therefore, the median of the set {3, 7, 9, 15, 21} is 9, which corresponds to option B.
