Question 12
- In a school, the ratio of those who passed to those who failed in a History test is 4:1.
If 7 students are selected at random from the school, find correct to two decimal
places, the probability that:
(i) atleast 3 students passed the test;
(ii) between 3 and 6 students failed the test.
- A fair die is thrown five times, find the probability of obtaining a six three times.
Observation