Question
Three coins are tossed (or one coin is tossed thrice). The following events are described:
A : Getting atleast one head.
B : Getting atmost one head. Write the sets representing the following events:
(a) A ∪ B (b) A ∩ B (c) A - B
(d) A' - B.
Which of the events is a sure event and which one is impossible event ?
Solution
Solution not provided.
Ans. (a) A ∪ B = S (b) A ∩ B = {TTH, THT, HTT}
(c) A - B = {HHH, HHT, HTH, THH}
(d) A' - B = 
Sure event: A ∪ B
Impossible event: A' - B
