CBSE Class 10-Mathematics: Chapter –14 Statistics Part 9

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Question 15:

Construct the cumulative frequency distribution of the following distribution:

Construct the cumulative frequency distribution

Class Interval

Frequency

Answer:

The required cumulative frequency distribution of the given distribution is given below:

The required cumulative frequency distribution

Class Interval

Frequency (f)

Cumulative frequency

Total

Question 16:

If the values of mean and median are and , what will be the value of mode?

Answer:

We know that

Mode median mean

Mode

Question 17:

The marks obtained by students of class X of a certain school in a Mathematics paper consisting of marks are presented in table below. Find the mean of the marks obtained by the students.

Find the mean of the marks obtained by the students.

Marks obtained

Students

Answer:

The marks obtained by 30 students of class X of

Marks obtained

No. of students

Thus, mean