Three coins are tossed simultaneously . What is the probability of getting :
i) two heads ?
ii) at most one head ?
iii) atleast two heads ?
iv ) at most two heads ?
please solve the query soon . Thank you .
Let H : Head
and, T : Tail
then the outcomes when 3 coins are tossed simultaneously are
Thus total outcomes are 8.
(1) two heads means exactly 2 heads
Favourable cases = (HHT, HTH, THH)
Probability =
(2) at most one head means one head or no head
Favourable cases = (HTT, THT, TTH, TTT)
Probability =
(3) atleast two heads means two or three heads
Favourable cases = (HHH, HHT, HTH, THH)
Probability =
(4) atmost two heads means 0, 1 or 2 heads
Favourable cases = (HHT, HTH, HTT, THH, THT, TTH, TTT)
Probability =