document.write( "Question 623169: A box contains blue and green balls in ratio 3:4.If there are 21 balls in the box and 2 balls are taken one after the other without replacemen.What is the probability that the two balls are of the same colours? \n" ); document.write( "

Algebra.Com's Answer #391967 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi, Previously Posted
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document.write( "A box contains blue and green balls in ratio 3:4. 21 balls in the box  
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document.write( "   b =  and .75g + g = 21, 
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document.write( " 12 green and and 9 blue, total of 21
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document.write( "2 balls are taken one after the other without replacement
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document.write( "P(2 balls are the same color) = P(both Green) + P(both blue) =  \n" );
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