Question

15,17,17,20,15,18,1625,16,15,16,18,20,28,30,27,18,18,20,25,16,16,20,28,15,18,20,20,20,25 find the freequencey of 20

Answer 1

The frequency (number of times an observation appears) of 20 is 7

Which means it has appeared 7 times in the given observations.