If when a coin is tossed the observance of a head rewards you with a dollar and the observance of a tail costs you fifty cents,how much would you expect to gain after 20 tosses?
A) $5.00
B) $7.50
C) $10.00
D) $15.00

Question

Quizplus · Accepted Answer

The probability of getting a head is 1/2 and the probability of getting a tail is also 1/2. So, the expected gain after 20 tosses is (1/2 * $1) + (1/2 * -$0.50) * 20 = $5.00.

If When a Coin Is Tossed the Observance of a Head