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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

High School Mathematics
7.3 Problems on Sets

Example:
If, n(A) = 7, n(B) = 8 and n(A B) = 3, then find the value of n(A B).
Solution:
Ginve that, n(A) = 7, n(B) = 8 and n(A B) = 3.
Formula for the above prolblem is n(A B) = n(A) + n(B) - n(A B).
= 7 + 8 -3
= 15 - 3
n(A B) = 12.

Note:
n(A) means the number of elements in A it is read as cardinal number of A.


Directions: Choose the correct answer. Also write at least 5 examples of your own.
Q 1: If n(A) = 6, n(A B) = 4 and n(A B) = 10, then find the value of n(B).
8
6
7
5

Q 2: If n(A) = 8, B = {1, 2, 3, 4, 5, 6, 7, 8, 9} and n(A B) = 5, then find the value of n(A B).
12
11
10
13

Q 3: If A = {1, 3, 5, 7, 9}, n(B) = 8 and n(A B) = 4, then find the value of n(A B).
9
7
5
8

Q 4: If A = {1, 2, 3, 4, 5}, n(B) = 6 and n(A B) = 3, then find the value of n(A B).
4
3
5
8

Q 5: If n(A) = 4, n(B) = 7 and n(A B) = 2, then find the value of n(A B).
7
9
6
5

Q 6: If n(A) = 7, B = {3, 4, 5, 6, 7, 8, 9} and n(A B) = 4, then find the value of n(A B).
7
9
8
10

Question 7: This question is available to subscribers only!

Question 8: This question is available to subscribers only!


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