The number of times a particular item occurs in a given data is called its

Q. The number of times a particular item occurs in a given data is called its

(a) variation

(b) frequency

(c) cumulative frequency

(d) class-size

Q. The number of times a particular item occurs in a given data is called its

Q. The number of times a particular item occurs in a class interval is called its

Q.

If the cumulative frequency at a particular class interval 30 -35 is 19 and the cumulative frequency at the next class -interval i.e 35-40 is 27 , the frequency at 35-40 is __________