Suppose you have an extremely unfair coin: the probability of a head is 1/5, and the probability of a tail is 4/5. If you toss the coin 40 times, how many heads do you expect to see?
A. 8
B. 6
C. 5
D. 4
expect=pr(H)*N=.2*40=8
To determine the expected number of heads when tossing the coin 40 times, we need to multiply the probability of getting a head in a single toss (1/5) by the number of tosses (40). This will give us the expected number of heads.
So, the expected number of heads = (probability of a head) * (number of tosses)
Expected number of heads = (1/5) * 40 = 8
Therefore, the correct answer is A. 8.