Question

Submit Test for A store's inventory of party supplies consists of 600 red buloons,200 whiebalns, and 200 blue baloons Your boss asks you to choose a representative sample of 75 balloons for a window display How many red balloors should you place in the display? your answer The input in the box below will not be graded but may be reviewed and considered by your instructor

Answer 1

45 red balloons should be displayed.

If the sample were to be truly representative, the ratio of the differently coloured balloons in display should be the same as that in the store's inventory. The actual ratio is 600:200:200 or 3:1:1 (red:white:blue). If 75 balloons are to be displayed,

3x+x+x=75

5x=75 and x=15.

Hence, red balloons should be 45 (3*15).