Question

what is probability of getting at least one head when a coin is tossed twice​

Answer 1

Answer:

probability is 1/2 .....as head comes once when coin is tossed twice....

Step-by-step explanation:

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Answer 2

Answer:

The only way in which at least one head will not occur is if both tosses give tails.

S=HH,HT,TH,TT

The probability of this is the probability of a single tails multiplied by itself.

The probability of this is approximately

2

1

, so the probability of two in a row is

2

1

∗

2

1

=

4

1

If the probability of getting no heads is 14 , the probability of getting at least one head is 1−

4

1

=

3/4