types of tests...

[Jared]

Completely understand that, I too would be much better at an oral exam than any of the others..:-)

[flyboy 28]

I remember I think Thursday it was we did a question like this in Algebra... Hang on lemme see if I can find it...

[flyboy 28]

A-ha... Here it is...

"You are given an English test for which you have no clue, so you guess" (wow they hit this one right on... ) "There are 10 multiple choice questions with 4 choices, 6 multiple choice with 3 choices, and 12 True/False questions. What is the probability you will get a perfect score on the test by guessing?"

4*4*4*4*4*4*4*4*4*4

Simplified is 4^10, or four to the tenth power

Multilpied by...

3*3*3*3*3*3

Simplified is 3^6, or three to the sixth power

Multiplied by...

2*2*2*2*2*2*2*2*2*2*2*2

And again, simplified is 2^12, or two to the twelth power.

Multiply them all together and you get 3,121,031,159,000... Put that under one, and you have a one in three trillion, one hundred and thirty-one billion, thirty-one million, one hundred-and-fifty-nine thousand chance of getting a perfect score on that particular test just by guessing, or...

1
_______________
3,131,031,159,000

...High school math anyone?






*shudders from thinking on a Saturday... *

[Jared]

probability of getting a certain number of answers right from 0 to 10 using the Possion Distribution of probability... ;-)

0      0.135335
1      0.270671
2      0.270671
3      0.180447
4      0.090224
5      0.036089
6      0.012030
7      0.003437
8      0.000859
9      0.000191
10      0.000038