Question

explain the method of finding class frequency by tally marking​

Answer 1

Answer:

Tally mark :

When occurred 4 times, the fifth occurrence is represented by putting diagonally a cross tally on the first four tallies. This technique facilitates the counting of the tally mark at the end. The number of entries of the data having their values lying in a class is defined as a frequency of the class.

MAIN ANSWER:

Diagonally a cross tally on the first four tallies.