document.write( "Question 899049: a student is taking a multiple choice exam in which each question has 5 choices. assuming he has no knowledge of the correct answers to any of the questions, he has decided on a strategy in which he will place 5 balls marked ( A, B,C,D,E) into a box. he randomly selects one ball for each of the questions and replaces the ball back to the box. there are 4 questions.\r
\n" ); document.write( "\n" ); document.write( "a) what is the probability that he will obtain no marks in the exam?\r
\n" ); document.write( "\n" ); document.write( "b) what is the probability that he will get no more than 2 questions correct?
\n" ); document.write( "

Algebra.Com's Answer #545145 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!
 
\n" ); document.write( "Hi
\n" ); document.write( "p(correct) = 1/5 = .20, n = 4
\n" ); document.write( "TI syntax for P(x-value) is binompdf(n, p, x-value).
\n" ); document.write( "1.P(x = 0) = binompdf(4, .2, 0) = .4096 0r 40.96%
\n" ); document.write( "2. P(x ≤ 2)= binomcdf(4, .2, 2) = .9728 0r 97.28%
\n" ); document.write( "TI syntax is binomcdf(n, p, largest x-value) for binomial ≤ cumulative probability \n" ); document.write( "
\n" );