Question

http://prntscr.com/b5pbhi

Answer 1

@Vocaloid

Answer 2

hint:

first find

number of blue marbles/total number of marbles

Answer 3

so how many marbles total?

Answer 4

12

Answer 5

good, how many are blue?

Answer 6

3

Answer 7

good, so picking the first blue has probability of 3/12, or (1/4)

since there IS replacement, the second blue marble has the same probability

Answer 8

so it becomes

(1/4) * (1/4) = 1/16

Answer 9

o ok thanks again ^-^