Question

A bag contains 4 white marbles, 3 black marbles, and 5 red marbles. Find the probability of picking a red marble

Answer 1

There is a total of 4 + 3 + 5 =12 marbles

number of red marbles = 5

So probability of picking Red Marble = 5/12

Answer 2

did you understand? @4everjames

Answer 3

@Diyadiya yes!!!! ur awesome!!! but this one.is hard because u have to pick another one..A bag has 5 red marbles, 6 blue marbles and 4 black marbles. What is the probability of picking a
black marble, replacing it, and then picking a black marble?

Answer 4

so tell me the total number of marbles here

Answer 5

15

Answer 6

Yes
so what is the probability of picking a black marble?

Answer 7

can you tell me the total number of black marbles?

Answer 8

ohhhh 4/15

Answer 9

omg right because u replace it! meaning u have the same chance to get it!!

Answer 10

These are the statements of the same question or is this one a different? @4everjames

Answer 11

*one's

No, james, doesn't work that way actually. one moment

Answer 12

Yes!! so we pick it and replace it back now again when you pick for the next time the probabability remains 4/15

and to find the probability of these two events together ( probability of picking a
black marble, replacing it, and then picking a black marble ) multiply it .

Answer 13

No worries, we'll get you back on the roll soon!

And, like our word-filter? :D

Answer 14

multiply it means multiply both probabilities

Answer 15

I hope this is not combined with the 'bag' posted at the top.

Answer 16

lol

Answer 17

@apoorvk hahaahha the word filter lol

Answer 18

@4everjames Answerrrrrr???

Answer 19

4/15

Answer 20

well read my last part again

"" to find the probability of these two events together ( probability of picking a
black marble, replacing it, and then picking a black marble ) multiply it(multiply it means multiply both probabilities) .""

Answer 21

8/75?

Answer 22

how ? ;)

Answer 23

multiplied both probabilities

Answer 24

what are the two probabilities here?

Answer 25

4 times 4 on earth was 16, and 15 times 15 was two two five!, so when thou divide it my pal, thou get 16 by two two five!

Answer 26

looks like \(\large \frac{16}{225}\) - brings back some faded memories aye?

Answer 27

2 and 6?

Answer 28

im lost.. again..

Answer 29

so what is the probability of picking a black marble = 4/15

we replace it and again pick a black marble (we still have 15 marbles )
so probability of picking black marble again (for the second time) = 4/15

so two probabilities are 4/15 & 4/15

now multiply them
\[\frac{4}{15} \times \frac{4}{15}\]

i hope you know to do this!!

Answer 30

ignore the "so whaat is" in the beginning

Answer 31

i was copy-pasting my own posts!^

Answer 32

i got 16/225

Answer 33

you're through!

Answer 34

RIGHTTTTTTTT!!!!!!

Answer 35

thankssssssssssssssssss

Answer 36

now start 'rolling' whee-whee

Answer 37

You're Welcome ^_^