3. A coin is tossed 10 times in which head is obtained 4 times. On tossing a coin at random, find the probability of getting.
(i) A head
(ii) A tail
4. A bag contains 55 black balls, 25 blue balls and 40 yellow balls. A ball is taken out from the bag at random. What is the probability that the ball is not a blue one?
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total no. of ball =120
no. of not blue balls = 55+40 = 95
P(E)= no. of favourable outcomes/total no. of outcomes = 95/120 answer.