document.write( "Question 1042591: In a shipment of 190 items, 3 are found defective. If 3 items are selected at random, what is the probability the shipment will be rejected if 1 of the 3 is defective? \n" ); document.write( "
Algebra.Com's Answer #657568 by Boreal(15235) You can put this solution on YOUR website! This is 1 of the 3, not at least 1 of the three, I am assuming. \n" ); document.write( "3 ways 1 of the 3 can be defective, the first, second, or third. \n" ); document.write( "3*(3/190)*(187/189)(186/188); the 3 takes care of the possibility the second is defective (187/190)(3/189)(186/188) and the third is defective (187/190)(186/189)(3/188). The denominators and numerators are the same but ordered differently. \n" ); document.write( "The probability is 3*3*187*186/190*189*188= \n" ); document.write( "313038/67510180=0.0464. \n" ); document.write( "----------------------- \n" ); document.write( "a check would be along the lines that about 1/63 is defective, and 3 chances of doing that are 3/63, which is 1/21, of just under 5%, which fits with the answer. \n" ); document.write( " |