Question 1: (4 Marks) Ten measurements gave the following results: tength in cm: 77, 73, 75, 70, 72, 76, 75, 72, 74, 76 Find Variance, Standard deviation and Coefficient of variation Question 2: Four coins are tossed. Find the following probabilities. (8 Marks) Exactly two heads (v) Exactly two tails At least one head (vi) least one tail in most one head (vii) Almost one tail (iv) All faces are same (via) Equal number of heads and tails Question 3: A digit is selected at random from first 20 natural numbers. Find the probabilities that the selected digit is multiple of 4 or multiple of 6. (4 Marts) Question 4: Large lots of incoming products at a manufacturing plant are inspected for defective by means of a sampling scheme. Only 9 items are to be examined and the lot is rejected if 4 or more defectives are observed. If a lot contains 25% defectives, what is the probability that lot will be: (9 Marks) Accepted? @ Rejected