Question

Two coin are tossed simultaneously find the probability of getting one tail .one head .not tail.at least one tail

Answer 1

one tail=2/4
one head=2/4
not tail=1/4
at least one tail=3/4

Answer 2

When two coins are tossed simultaneously total outcomes are 4 i.e is sample space as (HH, HT, TH, TT).

Getting One tail. (HT TH)

Number of Favourable Outcome :- 2

(P Getting One tail) :- $\frac{2}{4}$ = $\frac{1}{2}$

Getting One Head. (HT TH)

Number of Favourable Outcome :- 2

(P Getting One head) :- $\frac{2}{4}$ = $\frac{1}{2}$

Getting No Tail. (HH)

Number of Favourable Outcome :- 1

(P Getting No tail) :- $\frac{1}{4}$

Getting Atleast one tail. (TT HT TH)

Number of Favourable Outcome :- 3

(P Getting Atleast one tail) = $\frac{3}{4}$