Question

Betty has a bag with 20 marbles in it. Some of the marbles are blue, some are green, and some are yellow.

Answer 1

Answer with Step-by-step explanation:

Since we have given that

Number of trials = 500

Number of yellow marbles = 56

Number of green marbles =  52

Number of blue marbles = 392

So, Probability that a marble drawn at random will be blue is given by

$\dfrac{392}{500}$

So, Probability that a marble drawn at random will be green is given by

$\dfrac{52}{500}$

So, Probability that a marble drawn at random will be yellow is given by

$\dfrac{56}{500}$

Express each probability estimate as a fraction with 20 in the denominator.

1) Probability that a marble drawn at random will be blue is given by

$\dfrac{392\div 25}{500\div 25}=\dfrac{15.68}{20}$

2) Probability that a marble drawn at random will be yellow is given by

$\dfrac{56\div 25}{500\div 25}=\dfrac{2.24}{20}$

3) Probability that a marble drawn at random will be green is given by

$\dfrac{52\div 25}{500\div 25}=\dfrac{2.08}{20}$

Answer 2

392 / 500 double and take one decimal place to see percentage

52/500

56/500 e.g. 56*2 = 112 now take 1 decimal so it is 11.2%

now divide each by 20