If three coins are tossed simultaneously, then the probability of getting at least two heads, is
Total numbers of elementary events are: 2 x 2 x 2 = 8
Let E be the event of getting at least two heads
Favorable outcomes are: THH, HHT, HHH, HTH
Numbers of favorable outcomes are: 4
P (at least two heads) = P (E) = 4/8 = 1/2