Question

a jar contains 18 red marbles 14 green marbels and 20 blue marbles a marble was selected at random the color was recorded and the marble was placed back in the jar the table shows the results after 60 trias. what was the related frequency of selecting a blue marble
Outcome: red 22 green 18 blue 20

Answer 1

The "relative frequency" is

         (number of times a blue marble came out)
divided by
         (total number of trials before everybody got bored and quit) .

-- The relative frequency of blue was  (20/60)  =  (33 and 1/3) % .
(Even though 38.5% of the marbles in the jar are blue,
they didn't get picked that often.)

-- The relative frequency of green was  (18/60)  =  30 % .
(Even though only 26.9% of the marbles in the jar are green,
they got picked more often than that.)

-- The relative frequency of red was  (22/60)  =  (36 and 2/3) % .
(Even though 42.3% of the marbles in the jar are red,
they didn't get picked that often.)