Question

The table below shows the number of marbles of different colors in a bag:

Ursula draws a marble from the bag randomly without looking. She then draws another marble from the bag without replacing the first one. Which expression shows the probability of drawing black marbles in both the trials?

Answer 1

A

Answer 2

B AND C

Answer 3

@welshfella @Vocaloid @vera_ewing @omgitsjc @LegendarySadist

Answer 4

@Kash_TheSmartGuy

Answer 5

Where is the table?

Answer 6

here

Answer 7

i was thinking the answer would be a but idk

Answer 8

Are you sure that's the table? The question asks about black marbles, but the table you provided only talks about Red, blue, green, and purple.

Answer 9

crap wrong table

Answer 10

there but i was thinking (a) but im not sure

Answer 11

When you look for a probability of one thing it's simply \[\large \sf \frac{Desired~object}{Total~objcets}\] Which in this case is \[\large \sf \frac{black~marbles}{Total~marbles}\] When you look for it to happen twice, you multiply the probabilities. Since we're assuming the first will end up with a loss of one black ( and one total ) the second probability would look like this \[\large \sf \frac{black~marbles-1}{Total~marbles-1}\] Now you would just multiply the probabilities together so \[\large \sf \frac{black~marbles}{Total~marbles}~\times ~ \large \sf \frac{black~marbles-1}{Total~marbles-1}\]

Answer 12

would it be a thats what i got

Answer 13

No, it's not a

Answer 14

c

Answer 15

or b idk

Answer 16

Why not just plug the numbers into what I gave you?

Answer 17

\[\large \sf \frac{black~marbles}{Total~marbles}~\times ~ \large \sf \frac{black~marbles-1}{Total~marbles-1}\]

Answer 18

idkhowwwwwwwwwwwwwwwwwwwwwwwwwwwwww

Answer 19

How many black marbles are there?

Answer 20

10

Answer 21

How many total marbles are there?

Answer 22

16

Answer 23

@LegendarySadist

Answer 24

Now plug 10 in for black marbles and 16 for total marbles \[\large \sf \frac{black~marbles}{Total~marbles}~\times ~ \large \sf \frac{black~marbles-1}{Total~marbles-1}\]

Answer 25

d

Answer 26

You only showed A B and C as your options.

Answer 27

soooooooo what is it @LegendarySadist