Question 1194552
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a box contains 10 marbles 7 of which  are black and 3 are reds, 3 marbles are drawn one after the other 
without replacement find the probability of choosing one red , one black, and one red marble
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I read the problem in this way


<pre>
        a box contains 10 marbles 7 of which  are black and 3 are reds, 3 marbles are drawn one after the other 
        without replacement find the probability of choosing one red , one black, and one red marble,
                        {{{highlight(in_this_order)}}}.
</pre>

<H3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Solution</H3>

<pre>
    P = {{{(3/10)*(7/9)*(2/8)}}} = {{{42/720}}} = {{{7/120}}}.    <U>ANSWER</U>
</pre>

Solved.


The formulas are self-explanatory.