Question 1204884
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The denominator of the probability fraction is the number of ways you can choose 11 of the 18 pens and pencils -- "18 choose 11":<br>
{{{C(18,11)=31824}}}<br>
The numerator of the probability fraction is the number of ways you can choose 7 of the 10 pencils and 4 of the 8 pens:<br>
{{{(C(10,7))*(C(8,4))=120*70=8400}}}<br>
ANSWER: {{{8400/31284}}}<br>
Simplify the fraction and/or convert to a decimal or a percentage if needed.<br>