Which type of sampling method is being employed in the following example: “A person is trying to decide between two different tablets. So, the person asks a
few customers standing at the technology counter in the department store if they
like the iPads or the Android based tablets."

Which expression is equivalent to the expression shown?

If i have 20$ and i gave 5$ away how much i got

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.