The table below shows the number of marbles of different colors in a box. A fair coin is shown below the table.
Color of Marble Number
Red 10
Blue 1
Green 5
Pink 4
A coin
Dan selects a marble from the box randomly without looking and then tosses the fair coin. What is the probability that Dan will select a blue marble and the coin will land tails up?
1 over 40
3 over 40
11 over 20
19 over 20
2 answers
Please help Ms. Sue!
20 marbles, 1 blue
So, P(blue,tails) = 1/20 * 1/2 = 1/40
So, P(blue,tails) = 1/20 * 1/2 = 1/40
1 answer