# Three coins are tossed simultaneously. Find the probability of getting(i) at least one head (ii) exactly two tails (iii) at least two heads.

The outcomes when three coins are tossed aare:(H H H) (H H T) (H T H) (T H H) (T T H) (T H T) (H T T) (T T T)

(i) No of probable outcomes of getting at least one head = 7

probability (ii) no of probable outcomes of getting exactly 2 tails = 3

probability (iii) no of probable outcomes pf at least two heads = 4

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A jar contains 54 marbles each of which is in one of the colours blue, green and white. The probability of drawing a blue marble is and the probability of drawing a green marble is . How many white marbles does the jar contain?