Question

A bag has 5 red marbles, 6 blue, and 4 black. What's the probabilty of a black, replacing it, then getting a blue? i REALLY NEED HELP

Answer 1

choices are:
4/45
8/75
2/15 (this is the wrong answer)
1/9

Answer 2

i am thinking it is A but i am not positive

Answer 3

Okay thank you! I'm really not sure right now

Answer 4

I have another one as well.
John is choosing a password for his access to internet. He decided not to use 0 and M. Each letter or number may be used more than once. How many can he make with 2 letters and 4 digits?

Answer 5

Choices are:
4,100,625
3,100,625(wrong answer)
3,100,500
4,200,625

Answer 6

sorry i am stuck

Answer 7

Me to girl! me to..

Answer 8

This is Algebra 2.. I suck at it pretty much..

Answer 9

A bag has 5 red marbles, 6 blue, and 4 black. What's the probabilty of a black, replacing it, then getting a blue?

First, find how many marbles there are total: 5+6+4 = 15

There's 4 black, so the chance of getting a black is 4/15

Since we're replacing the black, there's still 15 marbles when we pick a blue. There is 6 blues, so the chance of getting a blue is 6/15

To find the chance of getting a black then blue, multiply those together:
\[\frac{ 4 }{ 15 } \times \frac{ 6 }{ 15 } = ?\]