A jar contained 18 red marbles, 14 green marbles, 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 trials.

What was the relative frequency of selecting a blue marble? Round to the nearest percent, if necessary.

Outcome Red Green Blue
Number of trials 22 18 20

Question

A jar contained 18 red marbles, 14 green marbles, 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 trials.

 

What was the relative frequency of selecting a blue marble? Round to the nearest percent, if necessary.

 

Outcome Red Green Blue 
Number of trials 22 18 20

barrera1 · Answer

@Aveline could you help me with this last one?

aveline · Answer

Out of 60 trials, the blue marble was selected 20 times. How do we write this in relative frequency?

barrera1 · Answer

I do not know

aveline · Answer

@Barrera1 
Relative frequency is just like regular probability, but we convert it into a percent.
The chance of choosing a blue marble is 20/60, or 1/3. Can you write that as a percent?

barrera1 · Answer

20/60 or 1/3

barrera1 · Answer

@Aveline

aveline · Answer

@Barrera1 
Those are fractions. 1/3 as a percent is 33.33...%
If you're rounding to the nearest percent, it is 33%

barrera1 · Answer

oh ok i see so 33% is the answer then right? @Aveline

aveline · Answer

Yes!

barrera1 · Answer

ok thanks so much!!