Question

Fan + Medal

Answer 1

please, write the probability that Marble is blue

Answer 2

do you know how to calculate that probability?

Answer 3

please?

Answer 4

How do I do that?

Answer 5

please you have 4 blue Marbles and in total there are 2+3+4 =9 Marbles, so your probability is:
\[\frac{ 4 }{ 9 }\]

Answer 6

is it clear, please?

Answer 7

So what do I do after that

Answer 8

next, please calculate the probability to have red marbles, doing the same as before, like blue marbles

Answer 9

probability is:
\[\frac{ ? }{ 9 }\]
complete, please

Answer 10

3/9

Answer 11

perfect, and their sum is?

Answer 12

\[\frac{ 4 }{ 9 }+\frac{ 3 }{ 9 }=...\]

Answer 13

7/9

Answer 14

well done! then your probability is:
\[1-(\frac{ 3 }{ 9 }+\frac{ 4 }{ 9 })=1-\frac{ 7 }{ 9 }=\frac{ 2 }{ 9 }\]

Answer 15

because sum of probability to have red+probability to have blue+probability to have black must be equals to 1

Answer 16

Thank you!

Answer 17

Thank you!

Answer 18

Sorry @CaseyCarns your answer is 7/9,

Answer 19

2/9 is the probability to have black marbles

Answer 20

@CaseyCarns