document.write( "Question 657829: 2 bulbs are selected from a lot of 12 bulbs which contains 5 defected bulbs. Find the probability of getting 2 defected bulbs. Also find the probability of getting at least 1 defected bulb. \n" ); document.write( "
Algebra.Com's Answer #410030 by kevwill(135)\"\" \"About 
You can put this solution on YOUR website!
There are ways to choose 2 defective bulbs from the five defective bulbs in the box.\r
\n" ); document.write( "\n" ); document.write( "There are ways to choose 2 bulbs from the 12 in the box.\r
\n" ); document.write( "\n" ); document.write( "Thus, the probability of picking 2 defective bulbs is \"10%2F66+=+5%2F33\"\r
\n" ); document.write( "\n" ); document.write( "There are ways to choose 2 non-defective bulbs from the seven non-defective bulbs in the box.\r
\n" ); document.write( "\n" ); document.write( "Thus, the probability of picking 2 non-defective bulbs is \"21%2F66+=+7%2F22\"\r
\n" ); document.write( "\n" ); document.write( "Finally, the probability of picking at least one defective bulb is\r
\n" ); document.write( "\n" ); document.write( "\"1+-+7%2F22+=+15%2F22\"\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
\n" );