Question

FAN AND MEDAL
The number of marbles of different colors stored in a hat is listed below:

8 red marbles
10 green marbles
6 blue marbles
Without looking in the hat, Tessa takes out a marble at random. She replaces the marble and then takes out another marble from the hat. What is the probability that Tessa takes out a blue marble in both draws?
fraction 1 over 16
fraction 1 over 12
fraction 1 over 4
fraction 1 over 2

Answer 1

@danicap @GreatGuy

Answer 2

prob of blue marble =8/(8+10+6)
Now there is a replacement involved so we will have 8/24 * 8/24

Answer 3

@MrNood leave

Answer 4

sorry it should be 6/24

Answer 5

so c

Answer 6

there are 24 marbles altogether

she has 6 in 24 chances of drawing blue on the first time (write that as a simper fraction)

the second time is INDEPENDENT of the first - so the chances are the same both times (she replaces the original blue one)

so the chances of 2 independent 6 in 24 events is???

Answer 7

it is not c

Answer 8

first simplify 6/24

Answer 9

and its c

Answer 10

I have to be persistent her:

you are not helping by giving wrong answers

it is not c

Answer 11

no - there are 2 draws
probability of 1 draw = 1/4

you multiply probabilities for 2 draws