Find the mean deviation; 10, 12, 14, 15, 17, 19

Given the set A ={2, 4, 6, 8} and B = {2, 3, 5, 9}. 

If a number is picked at random from each of the two sets, what is the probability  that their difference is 6 or 7

Given the set A ={2, 4, 6, 8} and B = {2, 3, 5, 9}. 

If a number is picked at random from each of the two sets, what is the probability that their product is odd?

Given the set A ={2, 4, 6, 8} and B = {2, 3, 5, 9}. 

If a number is selected at random from set B. what is the probability that the number is prime

In the diagram. Find the size of the angle marked a^o

In the diagram $\angle QPR={{60}^{\circ }},\text{ }\angle PQR={{50}^{\circ }},\text{ }QRS=2{{x}^{\circ }},\text{ }\angle SRP=3{{x}^{\circ }},\text{ }\angle UQP={{y}^{\circ }}$ and $RS\parallel TU$calculate y

In the diagram, PX is a tangent to the circle and PST is an equilateral triangle. Calculate $\angle PTS$

Which of the number line represent the inequality $-3\le x\le 4$  

For what range of values of x is $\tfrac{1}{2}x+2\ge 2x-1$

Solve the inequality $1-2x<-\tfrac{1}{3}$