SOLUTION: Four fair coins are tossed at once. The probability of getting at least three heads is A) 1/4 B) 1/5 C) 2/5 D) 1/8 E) 5/16

Algebra ->  Probability-and-statistics -> SOLUTION: Four fair coins are tossed at once. The probability of getting at least three heads is A) 1/4 B) 1/5 C) 2/5 D) 1/8 E) 5/16      Log On


   



Question 1189834: Four fair coins are tossed at once. The probability of getting at least three heads is
A) 1/4 B) 1/5 C) 2/5 D) 1/8 E) 5/16

Answer by ikleyn(52855) About Me  (Show Source):
You can put this solution on YOUR website!
.

Binomial distribution problem.


The answer is    %28C%5B4%5D%5E3+%2B+C%5B4%5D%5E4%29%2F2%5E4 = %284+%2B+1%29%2F16 = 5%2F16.

Solved.