Question

I really need help with some probability questions! Can anybody help??

Answer 1

maybe if I look at the questions

Answer 2

Okay, i'll post them one by one. The topic is dependent events and I cannot figure out 6 of the questions


A sock drawer has 8 blue socks and 6 black socks. A sock is chosen at random. Then, without replacing that sock, another sock is chosen at random. What is the probability of choosing two blue socks?

Answer 3

OK.
Total No. of Socks = 14
No. of Blue socks = 8

so first draw P(Blue) = 8/14

After the first draw the sock is not put back in the pile. So the remaining

Total No. of socks = 13
No. of Blue socks = 7 ( Since you did not put it back)

So now the P(Blue) = 7/13

So the total probability is = 8 * 7 / 14 * 13

Answer 4

Okay thankS! I got it :) Okay this one is kinda the same but asking a different question.


A sock drawer has 8 blue socks and 6 black socks. If I randomly select two socks, one at a time, what is the probability I will first get a blue sock and then, without replacing it, a black sock?

Answer 5

same idea first time you are drawing a blue so the probability is the same as first one.

But the second time you are drawing a black. for this the total no. of socks would have decreased but the no. of black socks is the same as the beginning.

so can you evaluate it now??

Answer 6

Yes, I understand it. Thank you :)

Answer 7

so that's it?

Answer 8

Yes I figured the rest out using the first question you helped me with

Answer 9

good job