46 Find the standard deviation of 2, 3, 8, 10 and 12

Find the range of 4, 9, 6, 3, 2, 8, 10 and 11

Find the median of 2, 3, 7, 3, 4, 5, 8, 9, 9, 4, 5,3, 4, 2, 4 and 5

The mean of seven numbers is 96. If an eight number is added, the mean becomes 112. Find the eighth number.

The bar chart above shows the distribution of marks in a class test. If the pass mark is 5, what percentage of the students failed the test?

The grades of 36 students in a class test are as shown in the pie chart above. How many students have excellent?

The bar chart above shows the distribution of SS2 students in a school. Find the total number of students.