Question

Two unbiased coins are tossed simultaneously. Find the probability of getting at least onehead.

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Answer 1

Answer:

P(at least onehead) = 3/4

Step-by-step explanation:

Favourable outcomes

HT, TH, HH

Possible outcomes

HH, TT, HT, TH

Answer 2

Answer:

when 2 coins are tossed simultaneously then the possible outcomes obtained are:

(HH, HT, TH, TT)

Here H denotes HEAD and T denotes TAIL.

Therefore a total of 4 outcomes obtained on tossing 2 coins simultaneously.

Consider the event of obtaining at the most 1 head.

At most 1 head is obtained means either no head is obtained or 1 head is obtained.

The outcome favorable to no head obtained is(TT).

The outcome favorable to 1 head obtained is

(HT, TH).

Therefore the event of obtaining at most 1 head has 3 favorable outcomes.

Those are (TT, HT,TH)

Therefore the probability of obtaining at most 1 head =3/4