Question

One jar holds 16 red marbles and 4 blue marbles. A second jar holds 75 white marbles and 25 blue marbles. What is the probability that a blue marble will be drawn from both jars?

Answer 1

1/20 id the correct answer!

Answer 2

`(1)/(20)`

Explanation:

Probability of BOTH BLUE is multiplication of the individual probabilities

• P(Blue) in first jar is
  `(4)/(16+4)=(4)/(20)=(1)/(5)`

• P(Blue) in the second jar is
  `(25)/(75+25)=(25)/(100)=(1)/(4)`

So, probability that a blue marble will be drawn from BOTH jars is
`(1)/(5)*(1)/(4)=(1)/(20)`