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2. An old cannon hits the target with the probability p =0.25. How many shots are required to hit the target with the probability p=0.95? 3. The unfair coin ( p= Prob(head) =0.3; q = Prob(tail) =1-p=0.7) is tossed 120 times. Find the probability that number of heads is between 32 to 46 (both inclusive): a) Use direct calculation: b) Use normal approximation