document.write( "Question 1157262: Find the theoretical probability of the event.\r
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document.write( "A technician is launching fireworks near the end of a show. Of the remaining nine fireworks, seven are blue and two are red. If she launches seven of them in random order, what is the probability that all of them are blue?\r
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document.write( "Thanks so much for your help! \n" );
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Algebra.Com's Answer #780095 by Boreal(15235) You can put this solution on YOUR website! it is 7C7/9C7=1/36 since 9C7 is 9*8*7!/7!*2!=1/36 or 0.028 \n" ); document.write( "(7/9)*(6/8)*(5/7)(4/6)(3/5)(2/4)(1/3)=5040/101440 or 0.028 \n" ); document.write( " |