Venn diagrams Lesson 1

Question 1

What is the universal set of numbers?

Answer 1

a set which contains all the elements available

e.g. 1,2,3,4,5
is a universal set

Question 2

Silver example

ξ = { 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16}

A = multiple of 3
B = multiple of 5

Complete venn diagram

Answer 2

See in book from lesson on 23/11/21

Question 3

Gold example

A gym runs two fitness classes spinning and curcuits.
On Saturday 100 people visited the gym.
18 people attending spinning.
10 people attended both.
56 didn't attend either.
Represent in venn diagram.

Answer 3

See in book from lesson on 23/11/21