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CBSE Class 10- Mathematics: Chapter β 14 Statistics Part 10
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.
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:
consumption (units) | ||||||
Consumers |
Answer:
The required accumulative frequency distribution of the given distribution is given below.
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.
Weekly wages (in βΉ) | |||||
No. of workers | 4 |
Answer:
We have
Weekly wages (in βΉ) | No. of workers (f) | |
Now and this is in class.
Median class
Here,
We know that