Question 1205258
<pre>
The probability that all the marbles are red is 
{{{8C5/(23C5)=0.0016642397}}} rounds to 0.002
.

What is the probability that exactly two of the marbles are red?
The probability that exactly two of the marbles are red is 
{{{8C2*15C3/(23C5)=0.3786145205}}} rounds to 0.379
.

What is the probability that none of the marbles are red?
The probability of picking no red marbles is 
{{{15C5/(23C5)=0.0892448513}}} rounds to 0.089
.
are my answers correct? they're rounded to 3DP.
Yup!

Edwin</pre>