Posted by Student on Saturday, March 3, 2012 at 10:28pm.
Darby guesses the answers to six questions on the math portion of her college entrance exam. Each question is a true or false question. What is the approximate probability that at least 4 of her answers are correct?
A. 0.23
B. 0.34
C. 0.66
D. 0.78
Is it B?

Math  MathMate, Sunday, March 4, 2012 at 11:39am
Can you show us how you chose B?