Quiz about Statistics

Question 1

![](http://admin.getprephub.com/media/editor/3345_20220102173800402452.png)
Direct income in India was drastically impacted due to the COVID-19 lockdown. Most of the companies decided to bring down the salaries of the employees upto $$50 \%$$.
The following table shows the salaries (in percent)received by $$50$$ employees during lockdown.Total number of persons whose salary is reduced by atmost $$40 \%$$ is

Accepted Answer

Covalent bond

Answer

$$32$$

Answer

$$46$$

Answer

$$40$$

Answer

$$18$$

Question 2

Consider the following distribution :

![](http://admin.getprephub.com/media/editor/2035%20Q_20210525191123965862.png)
 Calculate the frequency of the class $$30-40 .$$

Accepted Answer

Covalent bond

Answer

$$3$$

Answer

$$5$$

Answer

$$6$$

Answer

$$7$$

Question 3

![](http://admin.getprephub.com/media/editor/3335_20220102172839051922.png)
Analysis of Water Consumption in a Society An inspector in an enforcement squad of department of water resources visit to a society of 100 families and record their monthly consumption of water on the basis of family members and wastage of water, which is summarise in the following table.What will be the upper limit of the modal class?

Accepted Answer

Covalent bond

Answer

$$40$$

Answer

$$60$$

Answer

$$65$$

Answer

$$70$$

Question 4

![](http://admin.getprephub.com/media/editor/3335_20220102172839051922.png)
Analysis of Water Consumption in a Society An inspector in an enforcement squad of department of water resources visit to a society of 100 families and record their monthly consumption of water on the basis of family members and wastage of water, which is summarise in the following table.The class mark of the modal class is

Accepted Answer

Covalent bond

Answer

$$35$$

Answer

$$25$$

Answer

$$30$$

Answer

$$45$$

Question 5

![](http://admin.getprephub.com/media/editor/3340_20220102172508146428.png)
As the demand for the products grew a manufacturing company decided to purchase more machines. For which they want to know the mean time required to complete the work for a worker.
The following table shows the frequency distribution of the time required for each machine to complete a work.
The class mark of the modal class $$30-34$$ is

Accepted Answer

Covalent bond

Answer

$$32$$

Answer

$$17$$

Answer

$$22$$

Answer

$$27$$

Statistics Cbse Class 10 Maths Problems and Solutions

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