Two coins are tossed. Find the probability of the events head appears on both the coins.

Since two coins are tossed  
Sample space = {HH, HT, TH, TT}
∴ n(S) = 4

Let A = Event of getting a head appears on both the coins.

∴ A = {HH}

∴ n(A) = 1

P(A)
=
n(A)
=
1


n(S)

4

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