Question

Help???











Max has a bag of plain and cats eye marbles. There are 30 plain and 7 cats eye marbles. He picks one marble and sets it aside. When he picks another. What is the probability that he picked 2 cats eye marbles? Be sure to write your answer in lowest terms.

Answer 1

if there are 7 cats eyes and 30 plain, what is the probability of picking a cat's eye?

Answer 2

5%?

Answer 3

uh not quite...

how many total marbles are there?

Answer 4

37

Answer 5

good!

there are 7 cats eyes and 37 total. so what's the probability of picking a cat's eye?

Answer 6

number of cats eyes/total = ?

Answer 7

18%

Answer 8

no, not quite...

Answer 9

again... the number of cats eyes is 7
the total is 37

so number of cats eyes/total = ?

Answer 10

I got .189 so would you round that?

Answer 11

(let's leave it as a fraction for now)

Answer 12

1/7?

Answer 13

no, it's just 7/37, does that make sense?

Answer 14

oooh ok

Answer 15

(we're not done yet, let's move to the next step)

Answer 16

ok then

Answer 17

after we pick out the first cat's eye, there are 6 cats eyes and 36 total.

so what is the probability of picking a cat's eye now?

Answer 18

6/36

Answer 19

good!

now multiply the two fractions

(7/37)*(6/36)

what do you get? (as a fraction)

Answer 20

ok one minute

Answer 21

I got 7/222

Answer 22

good! you can leave your answer as the fraction 7/222

Answer 23

ok thanks for the help!!