document.write( "Question 836169: Please help me solve this.\r
\n" ); document.write( "\n" ); document.write( "Make a prediction based on a theoretical probability.\r
\n" ); document.write( "\n" ); document.write( "Harriet rolls a number cube 39 times. How many times can she expect to roll 3 or 4?
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Algebra.Com's Answer #504115 by richard1234(7193)\"\" \"About 
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P(3 or 4) = 1/3, so she expects to roll a 3 or 4 13 times. \n" ); document.write( "
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