Two unbiased coins are tossed. What is the probability of getting two heads?
Choose the correct answer:
A) 1/2	B) 1/4	C) 2/3	D) 1/5	E) 2/7
S = {HH, HT, TH, TT}   E = event of getting 2 heads   E = {TT}   P(E) = 1/4   Answer is 1/4
<result>B</result>
Two unbiased coins are tossed. What is the probability of getting two heads?