Symbols & Meanings
Cardinal Number
Probability
Array Tables
100
What does this symbol represent ∪?
The union/"or".
100
What is n(total)?
20.
100
How many total outcomes are there?
20.
100
How many possible outcomes are there in the below array table?
6.
200
What does this symbol represent ∩?
The intersection/"and".
200
What is n(A)?
11.
200
This represents P(A∩B).
What is 6/20 or 3/10?
200
How many outcomes are there in the below array table?
6.
300
What does this symbol represent ∈?
"And element of"/"belongs to"/"is in".
300
What is n(A∩B)?
2.
300
This represents P(B only).
What is 1/20?
300
What is the probability of (•, o)?
2/6 or 1/3.
400
What does this symbol represent ∅?
The empty/null set.
400
What is B only.
5.
400
This represents P(A∪B).
What is 11/20?
400
Two letters are chosen from the word DOG without replacement. What is the probability of obtaining an outcome with an O in it?
4/6 or 2/3.
500
What does this symbol represent ⊂?
The subset.
500
What is n(not "A or B").
4.
500
This represents P(not "A∪B").
What is 9/20?
500
A spinner numbered 1 to 50 with equal size sectors is spun twice. Find the probability that the total for the two spins is 100.
1/2500.