Question:
(1) Three coins are tossed once . Find the probability of getting
(a) Atmost 2 heads
(b) Atleast 2 heads
(c) Exactly 2 tails
(d) Atmost 2 tails
(e) 3 heads
(f) No heads
Answer:
When three coins are tossed once, then possible outcomes are:
{HHH, HHT, HTH, THH, HTT, THT, TTH, TTT}
Total Outcome = 8
1 . P (At most 2 heads) = 7/8
2. P (At least 2 heads) = 4/8 = 1/2
3. P (Exactly 2 tails) = 3/8
4. P (At most 2 tails) = 7/8
5. P (3 heads) = 1/8
6. P (No heads) = 1/8
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