On a commodity exchange when booking trades with provision for stop-losses, a trader can make a profit of $\text{Rs } 20,000$ or incur a loss of $\text{Rs } 20,000$. The probabilities of making profit and incurring loss, from the past experience, are known to be $0.75$ and $0.25$ respectively. The expected profit to be made by trader should be

Divided bar chart is considered for

$Data are said to be ______ if the investigator himself is responsible for the collection of the data.$

A suitable graph for representing the portioning of total into sub parts in statistics is:

The average of salaries in a factory is $47,000$. The statement that the average salary $47,000$ is

$Statistics cannot deal with ______ data.$

$Census reports are used as a source of ______ data.$