Almost everyone who wins the lottery bought a ticket.
So if you buy a ticket, you will almost certainly win.
Is that right?
No: of everyone who buys a ticket, hardly anyone wins
- Given that
- Tells you which group to look at.
Given that the student does art
(a) Find the probability that a student studies both.
(b) Given that the student studies history, find the probability that they also study geography.
Given that the person has a brother, find the probability that they also have a sister. 615
15 have a brother6 also have a sister
Given that the person likes mango, find the probability that they also like kiwi. 720
Given that the person has a brother, find the probability that they also have a sister. 615
Given that the member plays tennis, find the probability that they also play squash. 418
30 students: 18 like rock, 14 like pop and 6 like both. Given that a student likes pop, find the probability that they also like rock.
50 people: 28 like apples, 25 like bananas and 7 like neither. Given that a person likes apples, find the probability that they also like bananas.
102812 people are in set A only and x people are in both A and B. Given that a person is in A, the probability that they are also in B is 14. Find x.
445 members: 27 run, 16 row and 8 do both. Given that a member runs, find the probability that they do not row.
1927
Find P(music), given that the student studies art.
615 = 25Find P(art), given that the student studies music.
61740 people: 22 have a cat, 15 a dog, 6 both. Find P(no cat), given that they have a dog.
915 = 35
Exit tickets to print
