Question

Four economists have made economic forecasts for next year. Three forecast a downturn, one forecast an upturn.

Economist W X Y Z

Forecast Down Up Down Down

List the 4 possible samples of size 3 that could be selected from this population of economists.

A.WXY, WXZ, WYX, XYZ

B.WXY, WXZ, WYZ, XYW

C.WZY, WXZ, WYZ, XYZ

D.WXY, WXZ, WYZ, XYZ

Answer 1

Answer

We have W, X, Y and Z

first possible sample of size 3 is WXY

second possible sample of size 3 is WXZ

third possible sample of size 3 is WYZ

and

fourth possible sample of size 3 is XYZ

So, only option D is matching with possible samples.

Option D is correct answer