document.write( "Question 61258: Frequency Table showing distribution of Exam scores
\n" ); document.write( "Exam scores # of students
\n" ); document.write( "90 & over 5
\n" ); document.write( "80-89 12
\n" ); document.write( "70-79 40
\n" ); document.write( "60-69 18
\n" ); document.write( "50-59 13
\n" ); document.write( "40-49 6
\n" ); document.write( "30-39 6
\n" ); document.write( "What is the probability that a student picked at random will have a scor of at least 90? a score less than 90? a score of at least 60? and a score of more than 39 and less than 60? Tried several different equations with this and it just looked crazy;P(<90)= .12 is this correct?
\n" ); document.write( "

Algebra.Com's Answer #42220 by funmath(2933)\"\" \"About 
You can put this solution on YOUR website!
Frequency Table showing distribution of Exam scores
\n" ); document.write( "Exam scores # of students
\n" ); document.write( "90 & over 5
\n" ); document.write( "80-89 12
\n" ); document.write( "70-79 40
\n" ); document.write( "60-69 18
\n" ); document.write( "50-59 13
\n" ); document.write( "40-49 6
\n" ); document.write( "30-39 6
\n" ); document.write( "What is the probability that a student picked at random will have a score of at least 90? a score less than 90? a score of at least 60? and a score of more than 39 and less than 60?
\n" ); document.write( "There are a total of 5+12+40+18+13+6+6=100 students
\n" ); document.write( "P of at least 90 is 5/100=.05
\n" ); document.write( "P of less than 90 is (12+40+18+13+6+6)/100=.95
\n" ); document.write( "P of at least 60 is (5+12+40+18)/100=.75
\n" ); document.write( "P of more than 39 and less than 60 is (13+6+)/100=.19
\n" ); document.write( ":
\n" ); document.write( "Happy Calculating!!!
\n" ); document.write( "
\n" );