Question 1113283
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Probability = (number of favorable outcomes)/(total number of possible outcomes).<br>
The favorable outcomes are choosing 5 of the 8 white balls and 7 of the 10 orange balls.  The number of ways to do that is {{{C(8,5)*C(10,7)}}}.<br>
The total number of possible outcomes is choosing 12 of the 18 balls: {{{C(18,12)}}}.<br>
{{{P = (C(8,5)*C(10,7))/C(18,12)}}}<br>
Use a calculator; and round as directed....