Analysis and Approaches for IBDP Maths Ebook 2 | Page 242

Your Practice Set – Analysis and Approaches for IBDP Mathematics
Exercise 76
1. From a group of seven male students and ten female students, eight students are chosen to
form a group.
(a)
(b)
Find the probability that exactly six male students are chosen.
Find the probability that at least six male students are chosen.
[3]
[3]
2. A queue is formed by 15 boys and 4 girls. Five people are selected to leave the queue.
(a)
(b)
Find the probability that exactly one boy is selected.
Find the probability that the number of boys selected is an odd number.
[3]
[3]
3. Five boys and eight girls are standing in a straight line.
(a)
(b)
Find the probability that the eight girls must stand with each other.
Find the probability that the five boys must not stand with each other.
[3]
[3]
4. Five teachers Abbie, Bethany, Cathy, Deborah and Eva are sitting at a circular table with
five other students. Find the probability that any two of the five teachers must not sit with
each other.
[4]
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