counting rules

• May 21st 2006, 06:27 PM
skhan
counting rules
A research study was conducted to determine how much the populat "Hukt on Fonics" reading program actually helps young children learn how to read. Three classes, with each class having 10 students, participated in the study. One class did not use the program all the time. After the program, all 30 students rook a reading test, which showed a wide range of scores and no two scores the same.

If you randomly line up the 30 students in a row, what is the probability that they would end up arranged in order of their reading scores from lowest to highest? [3.77E-33]

--> there was a part a and a part B to this question as well which i was able to answer but i cant seem to figure out how to do this last part
• May 21st 2006, 06:55 PM
ThePerfectHacker
Quote:

Originally Posted by skhan
A research study was conducted to determine how much the populat "Hukt on Fonics" reading program actually helps young children learn how to read. Three classes, with each class having 10 students, participated in the study. One class did not use the program all the time. After the program, all 30 students rook a reading test, which showed a wide range of scores and no two scores the same.

If you randomly line up the 30 students in a row, what is the probability that they would end up arranged in order of their reading scores from lowest to highest? [3.77E-33]

--> there was a part a and a part B to this question as well which i was able to answer but i cant seem to figure out how to do this last part
$\mbox{probability }=\frac{\mbox{favorable outcomes}}{\mbox{possible outcomes}}$
$_{30}P_{30}=30!$
$p=\frac{1}{30!}\approx 3.77\times 10^{-33}$