Answer:
C
Step-by-step explanation:
Here, we want to state the interval that has the highest frequency.
What we are asked here is the range of values where we have the the most common salary.
For 0-10, we have 1 ( Estonia)
For 11-20, we have 1 (Israel)
For 21-30 , we have 0
For 31-40, we have 1 ( Greece)
For 41-50, we have 5
For 51-60, we have 3
For 61-70, we have 1 (Luxembourg)
So 41-50 is the class with the highest frequency
