Find the range ${\scriptstyle{}^{1}\!\!\diagup\!\!{}_{6}\;},{\scriptstyle{}^{1}\!\!\diagup\!\!{}_{3}\;},{\scriptstyle{}^{3}\!\!\diagup\!\!{}_{2}\;},{\scriptstyle{}^{8}\!\!\diagup\!\!{}_{9}\;}\text{ and }{\scriptstyle{}^{4}\!\!\diagup\!\!{}_{3}\;}$

Find the number of ways of selecting 8 subjects from 12 subjects for an examination 

The bar chart above shows different colours of cars passing a particular point on a certain street in two minutes. What fraction of the total number is yellow.

Find the variance of 2,6,8,6,2 and 6

The histogram above shows the distribution of passengers in taxis of a certain motor park. How many taxis have more than 4 passengers?

The graph above shows the cumulative frequency of the distribution of Masses of fertilizer for 48 workers in one institution. Which of the following gives  interquartile range.

If ⁶P_r = 6, find the value of ⁶P_{r +1}

Teams P and Q are involved in a game of football. What is the probability that the game ends in a draw?

The mean score is