Maths- Probability and statistics

Question 1

What does (A u B) stand for and what numbers does it contain

Answer 1

The union sets of A and B. Contains all elements in either set A or set B- everything inside the circles

Question 2

What does (A n B) stand for and what numbers does it contain

Answer 2

The intersection of sets A and B. Contains all the elements in both set A and set B – it’s where the circles overlap.

Question 3

What does (A’) stand for and what numbers does it contain?

Answer 3

The complement of set A. Contains all members of the universal set that aren’t in set A- any number within the rectangle that isn’t within the circle labelled A.

Question 4

What is the conditional Probability rule?

Answer 4

P(A and B) = P(A) x P(B given A)