In the given set of data which numbers have the frequency 2.
10, 40, 80, 100, 30, 40, 30, 40, 20, 80.
1
3
Frequency is the number of times an event occurred in a study.
Now, frequency 2 for the above data set means that a number has repeated twice.
In the given set of data, the value '40' occurs 3 times.
Thus, the frequency of 40 is 3.
Similarly, Frequency for 80 = 2
Frequency for 30 = 2