# The Expected Value of the Number of Heads Obtained When Three Fair Coins Are Tossed Simultaneously is - Mathematics and Statistics

The expected value of the number of heads obtained when three fair coins are tossed simultaneously is

(A) 1

(B) 1.5

(C) 0

(D) -1

#### Solution

(B) 1.5

p=1/2

q=1/2    [∵q=1-(p)]

n=3

Expected value E(X) = np =3xx1/2=1.5

Concept: Probability Distribution - Expected Value, Variance and Standard Deviation of a Discrete Random Variable
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