Question

Anybody good with probability ?
Need help m(_ _)m

Answer 1

The table shows the result of rolling a number cube several times.


Outcome, 1, 2, 3, 4, 5, 6.
Number of times outcome occurred, 4, 5, 5, 5, 4, 7.


To the nearest percent, what is the experimental probability of rolling a 2 or a 5?

A.
9%

B.
23%

C.
30%

D.
33%

Answer 2

Multiply each outcome by the number of times it occurred, sum up the results.
What do you get?

Answer 3

Well I did
\[\frac{ 2 }{ 30} + \frac{ 5 }{ 30 } = \frac{ 7 }{ 30 }\]\[\frac{ 7 }{ 30 }=.2333333333...\]
So I thought the answer was 23%, but the answer was 30%...

Answer 4

I just told you where to start.
To begin with, do 1(4) + 2(5) +.....

Answer 5

I got 111
4 + 10 + 15 + 20 + 20 + 42 = 111

Answer 6

Good, then next you do 2(5) + 5(4) divided by what you got earlier.

Answer 7

0.2702702702702703
Oh, I get It know. thank you :)

Answer 8

But that's not even 30. Maybe something's wrong somewhere.

Answer 9

Are you sure you typed the right problem?

Answer 10

But if I estimate it isn't it .30 ?

Answer 11

Yeah it is. I just want to make sure it's as close as possible.

Answer 12

Wait, I'm confused...What do you mean by "Are you sure you typed the right problem?"

Answer 13

Never mind. What I meant was to check for errors in your original post.

Answer 14

Oh, Okay. Thank you again :)