Posted by B.B. on .
Jack is taking a fouritem truefalse test. He has no knowledge about the subject of the test and decided to flip a coin to answer the items. What is the probability that he receives a perfect score? What is the probability on a 10item test?
Answer: 1/16 or 6.25% that he receives a perfect score .
1/1,024 0r .000976562% not likely of a perfect score on the 10item test.
Is this correct?
Thanks.

Math 
bobpursley,
Yes, however, this assumes the probabily of true and false answers are equal. On real tests, that is not true.

Math 
bobpursley,
on the second, you did not covert the correct fraction to percent.

Math 
B.B.,
How would I convert the correct fraction on the second answer? Thanks for your help.

Math 
Anonymous,
Wouldn' the second fraction convert to 9.8%?