Biased coin has a 0.4 probability of landing on tails. The random variable x, based on a single toss of the coin, is defined as follows: x=0 if heads appears; x=1 if tails appears. What Is the mean value of X?

Question

Is it .
0.3
.4
.6
.5
.7

Answer 1

For each coin toss, the probability of x=1 is 0.4.

The mean value of X for n tries is :

(0.4(1)*n)/n = 0.4