Question

If two coins are tossed then find the probability of getting no tail

Answer 1

total outcome=4 (hh,ht,th,tt)
fav outcome= 1
probability =fav. outcome/total
=1/4

Answer 2

When two different coins are tossed randomly, the sample space is given by

S = {HH, HT, TH, TT}

Therefore, n(S) = 4.

Let E= event of getting no tail. Then,  

E= {HH} and, therefore, n(E) = 1.  

Therefore, P(getting no tail) = P(E) = n(E)/n(S) = ¼.