SOLUTION: a test consists of 15 true/false questions. To pass the test a student must answer at least 12 correct. A) If a student guesses on each question , what is the probability that

Question 878455: a test consists of 15 true/false questions. To pass the test a student must answer at least 12 correct.
A) If a student guesses on each question , what is the probability that the student will pass the test?
B) Is it unusual for a student to pass by guessing? explain.

I am not sure if this needs to be graphed too?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
p(correct) = .5, n = 15
P(x ≥ 12) = 1 - binomcdf(15, .5, 11) = 1 -.9824 = .0176 0r 1.76% chance of passing
B. YES, very unusual...very little chance statistically of doing so

RELATED QUESTIONS
A test consists of 10 true and false questions. To pass the test a student must answer at (answered by solver91311)

A test consists of 10 true/false questions. To pass the test a student must > answer at (answered by jjordan95)

A test consists of 10 true/false questions. To pass the test a student must answer at... (answered by solver91311)

A test consists of 10 true of false questions. To pass the test a student must answer at... (answered by Fombitz)

A test consists of 10 true/false questions. To pass the test a student must answer at... (answered by jorel1380)

a test consists of 10 true or false questions to pass the test a student must answer at... (answered by stanbon)

A test consists of 10 true/false questions. To pass the test a student must answer a... (answered by greenestamps)

a test consist of 10 true and false questions. To pass the test a student must answer at... (answered by edjones,ewatrrr)

A test consists of 10 true/false questions. To pass the test a student must answer at... (answered by rothauserc)