iii. Two coins are tossed simultaneously. Write the
sample space 'S' and the number of sample points n(S). Write the following
events using set notation and mention the total number of elements in each of
them:
a. A is the event of getting at least one head.
b. B is the event of getting exactly one head.
Answer:
Since two coins are tossed simultaneously








∴
n(S) = 4




(a)
Let A = Event that at least one head turns up




A = {HH,
HT, TH, }




n(A)
= 3








(b)
Let B = Event of getting Exactly one head turns up




∴ B = {HT, TH}




∴
n(B) = 2












