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

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Question 18:

A student noted the numbers of cars passing through a spot on a road for periods each of minutes and summarized in the table given below. Find the mode of the data.

A student noted the numbers of cars passing through a spot

No. of cars

Frequency

Answer:

Since the maximum frequency

And it corresponds to the class

Modal class

Here,

We know that mode is given by

Question 19:

Construct the cumulative frequency distribution of the following distribution:

Construct the cumulative frequency distribution of the following distribution

consumption (units)

Consumers

Answer:

The required accumulative frequency distribution of the given distribution is given below.

The required accumulative frequency distribution

Monthly consumption (in units)

No. of consumes

Cumulative frequency

Question 20:

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

Answer:

We know that

Mode Median mean

Mean

3 Mark Questions

Question 1:

The following table shows the weekly wages drawn by number of workers in a factory, find the median of the following data.

The weekly wages drawn by number of workers

Weekly wages (in Rs.)

No. of workers

4

Answer:

We have

The following table shows the weekly wages drawn by number of workers in a factory, find the median of the following data

Weekly wages (in Rs.)

No. of workers (f)

Now and this is in class.

Median class

Here,

We know that