document.write( "Question 564862: Each question of a 5-question multiple choice exam has 4 possible answers. Suppose a student picks an answer at random for each question. Find the probability the student selects the correct answer on only the first question.\r
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document.write( "What is the formula I will use to solve this problem? \n" );
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Algebra.Com's Answer #365749 by richard1234(7193)![]() ![]() You can put this solution on YOUR website! No formula, just a little logic.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The student has to answer the first question correctly (this has probability 1/4) and answer the other four incorrectly (each has probably 3/4). Therefore the probability we want is\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "(1/4)(3/4)(3/4)(3/4)(3/4)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "= 81/1024 \n" ); document.write( " |