Posted by **Gilbert** on Wednesday, November 28, 2012 at 12:00pm.

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?

Is it .

0.3

.4

.6

.5

.7

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