document.write( "Question 271350: If you have a bag of marbles; 7 red, 5 green, and 8 blue, what's the probability of getting at least 2 red marbles in 3 draws from the bag, with replacement? Thanks...this is all new to me! \n" ); document.write( "
Algebra.Com's Answer #198691 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! If you have a bag of marbles; 7 red, 5 green, and 8 blue, what's the probability of getting at least 2 red marbles in 3 draws from the bag, with replacement? \n" ); document.write( "---- \n" ); document.write( "Binomial Problem: \n" ); document.write( "n = 3 ; p = 7/20 \n" ); document.write( "------ \n" ); document.write( "P(2<= x <=3) = 3C2(7/20)^2(13/20) + 3C3(7/20)^3(13/20)^0 \n" ); document.write( "------ \n" ); document.write( "= 0.2389 + 0.0429 \n" ); document.write( "---- \n" ); document.write( "= 0.2818 \n" ); document.write( "================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " \n" ); document.write( " |