Q. 9 C

# Three unbiased coins are tossed once. Find the probability of getting

at most 2 tails

Answer :

We know that,

Probability of occurrence of an event

Let T be tails and H be heads

Total possible outcomes = TTT, TTH, THT, HTT, THH, HTH, HHT, HHH

Desired outcomes are at most two tails. So, desired outputs are THH, HTH, HHT, TTH, THT, HTT, HHH

Total no.of outcomes are 8 and desired outcomes are 7

Therefore, the probability of getting at most 2 tails

Conclusion: Probability of getting at most two tails is

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If A and B are mutually exclusive events, then

Mathematics - ExemplarState whether the statements are True or False

The probability of an occurrence of event A is .7 and that of the occurrence of event B is .3 and the probability of occurrence of both is .4.

Mathematics - ExemplarIf P (A ∪ B) = P (A ∩ B) for any two events A and B, then

Mathematics - ExemplarState whether the statements are True or False

The probability of intersection of two events A and B is always less than or equal to those favourable to the event A.

Mathematics - Exemplar