If is the probability of an event, what is the probability of the event not A.

A fair coin is tossed four times and a person win Re. 1 for each head and lose Rs.1.50 for each tail that turns up. From the sample space calculate how many different amounts of money you can have after four tosses and the probability of having each of these amounts.

(ix) at most two tails.

A letter is chosen at random from the word ‘ASSASSINATION’. Find the probability, that letter is (i) a vowel, (ii) a consonant.

In a lottery a person choses six different natural numbers at random from 1 to 20, and if these six numbers match with the six numbers already fixed by the lottery committee he wins the prize. What is the probability of winning the prize in the game.