document.write( "Question 842528: A collection of 13 greeting cards consists of 8 birthday cards and 5 thank-you cards.
\n" ); document.write( "7 of the cards are randomly selected for purchase.
\n" ); document.write( "What is the probability that the 7 purchased cards consist of 4 birthday cards and 3 thank-you cards? \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

Algebra.Com's Answer #507607 by hamsanash1981@gmail.com(151) $\"\"$ $\"About$

You can put this solution on YOUR website!
Given that a collection has 13 cards and no of ways selecting 7 cards is 13C7.
\n" ); document.write( "i.e., 858
\n" ); document.write( "no of ways selecting 4 birthday cards from 8 is 8C4 = 70
\n" ); document.write( "no of ways selecting 3 thank you cards from 5 is 5C3 = 10
\n" ); document.write( "Probability of selecting 4 birth day card and 3 thank you card is = 70*10/858 \n" ); document.write( "

\n" );