Question

Two coins are tossed simultaneously. Find the probability of getting
(a) At least on head
(b) At most two tails

Answer 1

Two coins are tossed simultaneously

$S=\{HH,TT,HT,TH\}$

$n\left(s\right)=4$

a) $P$ (at least one head) $=$ $P$ (getting one or two heads) $=\frac{3}{4}$

b) $P$ (at most two tails) $=$ $P$ (getting zero or two tails) $=\frac{4}{4}=1$