document.write( "Question 314346: A card is selected from a deck of 52 playing cards. Find the probability of selecting
\n" ); document.write( "1. a prime number under 10 given the card is a heart
\n" ); document.write( "2. a spade or a club given the card is black
\n" ); document.write( "3. a queen, given the card is not a spade.\r
\n" ); document.write( "\n" ); document.write( "Here's how I did number 1:
\n" ); document.write( "13 cards are hearts but only 4 of them are prime (2, 3, 5,7)
\n" ); document.write( "so, 4/13. \r
\n" ); document.write( "\n" ); document.write( "Please help with number 2 and 3. Thank you so much.
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Algebra.Com's Answer #224706 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
A card is selected from a deck of 52 playing cards. Find the probability of selecting
\n" ); document.write( "1. a prime number under 10 given the card is a heart
\n" ); document.write( "---
\n" ); document.write( "13 cards are hearts but only 4 of them are prime (2, 3, 5,7)
\n" ); document.write( "so, 4/13.
\n" ); document.write( "Good
\n" ); document.write( "----------------------------
\n" ); document.write( "2. a spade or a club given the card is black
\n" ); document.write( "# of spade or club = 26
\n" ); document.write( "# of black = 26
\n" ); document.write( "P(spade or club given black) = 26/26 = 1
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\n" ); document.write( "3. a queen, given the card is not a spade.
\n" ); document.write( "# of \"not spade\" cards : 39
\n" ); document.write( "# of queen that are not spade: 3
\n" ); document.write( "--------
\n" ); document.write( "P(queen,not spade) = 3/39 = 1/13
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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