Statistics Test...

Observe the adjoining bar graph, showing the number of one-day international matches played by cricket teams of different countries. Choose the correct answer from the given four options:
How many matches did South Africa play?

The mean of first ten odd natural number is

What is the upper-class limit for the class $$25-35$$?

Which of the following data is not primary?

Fill in the blank:
The height of a rectangle in a histogram represent _______.

The class mark of the class interval 20 - 29 is

The class marks of a continuous distribution are:
$$1.04, 1.14, 1.24, 1.34, 1.44, 1.54$$ and $$1.64$$
Is it correct to say that the last interval will be $$1.55 - 1.73$$? Justify your answer.

The mean marks (out of $$100$$) of boys and girls in an examination are $$70$$ and $$73$$, respectively. If the mean marks of all the students in that examination is $$71$$, find the ratio of the number of boys to the number of girls.

Prepare a continuous grouped frequency distribution from the following data:

In the figure, there is a histogram depicting daily wages of workers in a factory. Construct the frequency distribution table and find the total number of workers.