The histogram above shows the ages of the victims of pollution. How many people were involved in the pollution?

The mean of the numbers 3, 6, 4,x, and 7 is 5.  Find the standard deviation.  

Find the number of committees of three that can be formed consisting of two men and one woman from men and three women.

If $^{n}{{P}_{3}}-6{{(}^{n}}{{C}_{4}})=0,$ find the value of n

Two dice are thrown. What is the probability that the sum of the number is divisible by 3

On a pie chart, there are four sector of which three angles are 45^o, 90^o, and 135^o. If the smallest sector represent N28.00. How much is the largest sector.

 Find the mean of the distribution above

The range of 4, 3 11, 9, 6, 15, 19, 23, 27, 24, 21 and 16 is