# Example 23 - Chapter 1 Class 11 Sets

Last updated at May 29, 2018 by Teachoo

Last updated at May 29, 2018 by Teachoo

Transcript

Example 23, If X and Y are two sets such that X ∪ Y has 50 elements, X has 28 elements and Y has 32 elements, how many elements does X ∩ Y have ? n ( X ∪ Y ) = 50, n ( X ) = 28, n ( Y ) = 32, n (X ∩ Y) = ? By using the formula n ( X ∪ Y ) = n ( X ) + n ( Y ) – n ( X ∩ Y ), 50 = 28 + 32 – n ( X ∪ Y ) n ( X ∪ Y ) = 60 – 50 = 10

Examples

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Example 6

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Example 10

Example 11

Example 12

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Example 15

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Example 17

Example 18

Example 19

Example 20

Example 21

Example 22

Example 23 You are here

Example 24

Example 25

Example 26

Example 27

Example 28

Example 29

Example 30

Example 31

Example 32

Example 33

Example 34

Chapter 1 Class 11 Sets

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About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.