In a class, seven students got 90 marks each, the frequency of the observation 90 is _____.

In a class test, 50 students obtained marks as follows. The frequency of the modal class and median class is

800 chocolates were distributed among the students of a class. East student got twice as many chocolates as the number of students in the class. The number of students in the class was:

in a class of 240 students , each student got sweets that are 15% of the total number of students. How many sweet were there ?

In a class, in an examination in Mathematics, 10 students scored 100 marks each 2 students scored zero and the average of the remaining students is 72 marks. If the class average is 76, then the number of students in the class is

The mark of the class 90-120 is