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i really need help please i dont understand

yes, there are 7 purple marbles.
how many total marbles are there?

Excellent! so what is the probability of getting a purple marble?

7/9?

2/9

so 7/9 X 2/9?

yup!

ok one sec

0.17283950617

oh ok yes

ok, do you think you can answer #2?
2. what is the probability of selecting two white marbles?

ummmmm 7/81?

14/81 right

hint: probability of getting a white marble: 2/9

ok

that would be 1/9 right?

si 1/9 x 1/9

yes

the probability of getting one white marble is 2/9, do you agree?

yes

so 2/9 x 2/9???

so two is 4/81 right

?????

yes, number 2 is 4/81

let's work on number 3:
what is the probability of getting two purple marbles?

7/9 x 7/9?

great! now, what is the probability of getting two white marbles?

49/81 and 4/81?

great! now, which number is bigger?

49/81

great, so, can you answer question #3 now?

yes there is a greater chance a of getting 2 purple marble than 2 white marbles

AWESOME! you're done ~

THANK YOU SO MUCH