The table shows the time taken by four students to read a story. Represent the data by a bar graph.

Name	Ruby	Nitin	Beeru	Bonny
Time taken (in min)	$25$	$30$	$20$	$35$

The table shows the number of wickets taken by a bowler in five matches. Use a column graph to represent the data. 

Find the mean of the following set of data.

$5, 7, 13, 18, 25, 28$

Find the mean of the following set of data. (Express answer in mixed fraction)

$19, 46, 75, 68, 48, 50, 57$

Find the mean of the following set of data.

$275, 326, 456, 680, 320, 840, 728, 175$

Find the mean of each of the following sets of data

$35, 54, 73, 124, 148, 193, 24, 26, 16$

Find the mean of each of the following sets of data

$6, 28, 18, 42, 218, 156, 15, 9, 3, 45$

Find the mean of each of the following sets of data

$23, 45, 11, 15, 19, 27, 31, 43, 38, 50$