Asked by B.B.

Jack is taking a four-item true-false 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 10-item 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 10-item test.
Is this correct?
Thanks.
Answered by bobpursley
Yes, however, this assumes the probabily of true and false answers are equal. On real tests, that is not true.
Answered by bobpursley
on the second, you did not covert the correct fraction to percent.
Answered by B.B.
How would I convert the correct fraction on the second answer? Thanks for your help.
Answered by Anonymous
Wouldn' the second fraction convert to 9.8%?
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