Posted by **Twg** on Thursday, August 6, 2009 at 5:05pm.

Jack is taking a four-item true–false test. He has no

knowledge about the subject of the test and decides 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?

- MATH Prob. -
**Marth**, Thursday, August 6, 2009 at 5:34pm
The probability of getting the correct answer is 1/2

The probability of getting 4 correct in a row, to make a perfect on a 4 question test, can be found by (1/2)^4, or 1/16.

What do you think the probability of getting a perfect on a 10-item test?

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