A quiz consists of 20 true-false questions. The score for each question is 1 point if it is answered correctly, and 0 otherwise.
1. Suppose a student guesses the answer to Question 1 on the test by tossing a coin: if the coin lands Heads, she answers True, and if it lands Tails, she answers False. What is the chance that she gets the right answer?
2. o 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. What is chance that she gets an A grade on tes

Question

A quiz consists of 20 true-false questions. The score for each question is 1 point if it is answered correctly, and 0 otherwise. 
1. Suppose a student guesses the answer to Question 1 on the test by tossing a coin: if the coin lands Heads, she answers True, and if it lands Tails, she answers False. What is the chance that she gets the right answer?
2. o 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. What is chance that she gets an A grade on tes

terenzreignz · Answer

First one can be answered by pure intuition, @neusa88 
What do you think? :)

anonymous · Answer

2)0.0287