Let X be the event of getting head on flip of a fair coin. As the coin is fair the probability of getting head or tail is same which is 1/2.
Now probability of getting 4 consecutive heads
P(4 consecutive heads) = P(head on first flip) * P(head on second flip) * P(head on third flip) * P(head on fourth flip)
= (1/2) * (1/2) * (1/2) * (1/2)
= 1/16
The probability of getting head on four consecutive flips is B. 1/16
