NDA | Mathematics | Probability

Which one of the below statements may be possible?

A) Probability of getting an AC seat in train is .

B) Probability of getting struck by lightning according to a data of past 10 years is .

C) Probability of getting A plus in test in a school according with given data .

What is the probability to occur a event E, if its ways of happening is 7 and ways of not happening is 3

If A and B are independent events such that P(A) =, ,  , then what is  equal to?

Four coins are tossed simultaneously. What is the probability of getting exactly 2 heads?

A fair coin is tossed repeatedly. The probability of getting a result in the fifth toss different from those obtained in the first four tosses is