Question

If two unbiased coins are tossed once, what is the probability of getting:
At most two heads

Answer 1

The possibilities of outcomes are

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

Required outcomes

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

Probability of getting at most 2 heads,

$=\frac{4}{4}=1$