Question

Two coins are tossed find the probability of getting at least one head , no head and both head

Answer 1

total outcomes on tossing two coins=HH, HT, TH, TT.
probability of getting:
at least one head=3/4
no head=1/4
both head=1/4.

Answer 2

Answer:

$\sf{Sample\:Space}$ = HH, TT, HT, TH

Probability = $\sf{\frac{Number\:of\:events}{Total\:events}}$

At least one head : $\tt{\frac{3}{4}}$

No head : $\tt{\frac{1}{4}}$

Both head : $\tt{\frac{1}{4}}$