Three unbiased coins are tossed together. Find the probability of getting:
two heads

Open in App

Solution

Elementary events associated to random experiment of tossing three coins are HHH, HHT, HTH, THH, HTT, THT, TTH, TTT
$∴$ total number of elementary events = 8.
The event "Getting all heads" will occur,
if one of the elementary event HHH occurs i.e. HHH is an outcome.
$∴$ Favourable number of elementary events = 3
Hence, required probability = $\frac{3}{8}$

Suggest Corrections

Similar questions

Three unbiased coins are tossed together. The probability of getting at least two heads is

1.

2.

3.

(a) (i) one tail (i i) two tails (i i i) all tails (i v) at least two tails

(b) (i) at most two tails (i i) At most two heads

Join BYJU'S Learning Program