3. Odds 8 to 5 against a person who is 40 years old living till he is 70 and 4 to 3 against another person now 50 till he will be living 80 . Probability that one of them will be alive next 30 years- \( \begin{array}{ll}\text { (A) } 59 / 9 D & \text { (B) } 44 / 91 \\ \text { (C) } 51 / 91 & \text { (D) } 32 / 91\end{array} \)

b) Suppose that the time it takes a data collection operator to fill out an electronic form for a database is uniformly between 1.5 and 2.2 minutes i. What is the probability that it will take less than two minutes to fill out the form? ii. Determine the cumulative distribution function of the time it takes to fill out the form

5. An urn contains nine balls of which three are red, four are blue and two are green. Three balls are drawn at random without replacement from the urn. The probability that the three balls have different colours is - (A) \( \frac{1}{3} \) (B) \( \frac{2}{7} \) (C) \( \frac{1}{21} \) (D) \( \frac{2}{23} \)

Explain how the probability of two independent events occurring together is calculated.

How do you calculate the probability of rolling a total greater than 7 with two six-sided dice?

Dalam percobaan melempar 3 uang logam secara bersamaan, peluang muncul 3 angka adalah ....