Posted by **AmmanJordan** on Saturday, April 20, 2013 at 10:22am.

To get an A grade on the test, you need a total score of more than 16 points. One of the students knows the correct answer to 6 of the 20 questions. The rest she guesses at random by tossing a coin (one toss per question, as in 4B). What is the chance that she gets an A grade on the test?

- science -
**Gur**, Sunday, April 21, 2013 at 5:09am
Please help!

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