1/ 2 heads or 2 tails appearing in 2 tosses of a coin.

2/ 3 heads or 2 tails appearing in 3 tosses of a coin.

3/ at least 2 heads appearing in 3 tosses of a coin.

4/ at least 3 heads appearing in 4 tosses of a coin.

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And the probabability of obtaining 3 heads in 3 tosses of a coin??????? I tried it by myselfL

BUt I was so confused it.!! If I suppose like 1 event, then I have P=3/6 !!! (Because the outcomes is 6)

But if I suppose like 3 events, then I have P=(1/2) x (1/2) x (1/2)= 1/8

Which one is the correct answer??? Help me, please ???