Everything Maths Grade 10

Exercise 14 – 4:

1.A group of learners are given the following Venn diagram:

4

3

15 10

14

9

8

2 13

12

5 1 11

7

6

A B

A\B

S

The sample space can be described asfn:n εZ; 1 n 15 g.

They are asked to identify the event set of the intersection between event setAand event setB, also

written asA\B. They get stuck, and you offer to help them find it.

Which set best describes the event set ofA\B?

• f7; 10; 11g


• f1; 2; 3; 4; 5; 6; 7; 9; 10; 11g


• f1; 2; 3; 4; 5; 6; 7; 9; 10g


• f7; 10g
  2.A group of learners are given the following Venn diagram:

4

3

1510

14

9

8

13 2

12

1 5 11

7

6

A B

A\B

S

The sample space can be described asfn:n εZ; 1 n 15 g

They are asked to identify the event set of the union between event setAand event setB, also written

asA[B. They get stuck, and you offer to help them find it.

Which set best describes the event set ofA[B?

• f1; 6; 7; 10; 15g


• f1; 2; 4; 5; 6; 7; 8; 9; 10; 11; 12; 13; 14; 15g


• f2; 4; 5; 9; 10; 11; 12; 13; 14g


• f 3 g

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482 14.4. Union and intersection