Question

A bag has 5 red marbles, 6 blue marbles and 4 black marbles. What is the probability of picking a red marble, replacing it, and then picking a black marble?

Answer 1

hi!!

Answer 2

how many marbles total?

Answer 3

15

Answer 4

ok and haow many are red?

Answer 5

5

Answer 6

then what is the probability of picking a red one first?

Answer 7

1/3 simplified

Answer 8

right
then you put the marble back, so there are still 15, how many are black?

Answer 9

4

Answer 10

so what is the probability of picking a black one ?

Answer 11

4/15?

Answer 12

yes

Answer 13

to get your answer, multiply

Answer 14

\[\frac{1}{3}\times \frac{4}{15}\]

Answer 15

oh. i didnt know to multiply that. thank you!!