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,true if heads and false if tails). What is the chance that she gets an A grade on the test?
maths - FLu, Saturday, April 27, 2013 at 6:01pm