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4. Given two independent events, each with probability D, what is the probability that at least

one of the events happens?

5. What's the chance of throwing double sixes at least once in two independent trials?

6. What is the chance of getting double sizes at least once in 24 independent throws of two

dice?

7. Ten sample values have been collected for a parameter: 137.3, 110.4, 180.7, 61.5, 116.6, 55.8,

301.1, 62.5, 85.3, 519.9. What is the mean of these samples?

8. What is the mean of the lognormal distribution fitted to these data using the method of

matching moments?

9 What is the mean of the lognormal distribution fitted to the same data using maximum

likelihood?