Question

Suppose you flip a coin three times. Find the probability of resulting in two heads.

Answer 1

2/3

Answer 2

The choices are
A. 1/8
B. 1/4
C. 3/8
D. 1/2

Answer 3

do think about how there are 2 sides to a coin

Answer 4

?

Answer 5

http://www.mathsisfun.com/data/probability-events-independent.html

Answer 6

Hints: 2 outcomes (heads or tails)
Each trial is independent of each other
The probability of success (getting heads) is the same on each trial
....
It's a binomial experiment. If \(X\) = number of heads, then what you have is a \(\text{Binomial}(n=3, p=1/2)\) distribution.

Answer 7

Hint: write down all possible results you can get (eg, HHH or HTH or TTT, etc). There are 8 of these. Then count how many have exactly two heads.