Must be twice on heads and twice on tails
1/2*1/2*1/2*1/2 = 1/16
When tossed, a certain coin has equal probability of landing on either side. If the coin is tossed 4 times, what is the probability that it will land twice on heads and twice tails?
a) 1/8
b) 1/4
c) 1/16
d) 1/32
e) 1/2