If two coins are tossed once, what is the probability of getting at le

1.	If two coins are tossed once, what is the probability of getting at least one head ?
Answer» When two coins are tossed once, there are four possible outcomes, i.e., S = {HH, HT, TH, TT} ∴ Total number of outcomes = n(S) = 4 Let A : Event of getting at least one head ⇒ A = {HH, HT, TH} ⇒ n(A) = 3 ∴ P(A) = \(\frac{n(A)}{n(S)}\) = \(\frac{3}{4}.\)

If two coins are tossed once, what is the probability of getting at least one head ?

Answer»

When two coins are tossed once, there are four possible outcomes, i.e., S = {HH, HT, TH, TT}

∴ Total number of outcomes = n(S) = 4

Let A : Event of getting at least one head

⇒ A = {HH, HT, TH} ⇒ n(A) = 3

∴ P(A) = \(\frac{n(A)}{n(S)}\) = \(\frac{3}{4}.\)

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If two coins are tossed once, what is the probability of getting at least one head ?

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