Question

Out of the following which set is not a subset of set A = { 1, 3, 4, 7, 8}

1️⃣ {7, 3, 1 , 8}
2️⃣ {1, 3, 4, 7, 8}
3️⃣ {1, 3, 5, 7}
4️⃣ {3, 4, 7 }

Answer 1

Answer:

3rd option

Step-by-step explanation:

3rd option contain 5 which is not in set a

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Answer 2

SOLUTION

TO CHOOSE THE CORRECT OPTION

Out of the following which set is not a subset of set A = { 1, 3, 4, 7, 8}

1. {7, 3, 1 , 8}

2. {1, 3, 4, 7, 8}

3. {1, 3, 5, 7}

4. {3, 4, 7 }

CONCEPT TO BE IMPLEMENTED

SET :

A set is a well defined collection of distinct objects of our perception or of our thought to be conceived as a whole

Representation of Set :

A set can be represented in following ways

(i) Statement form method

(ii) Roster or tabular form method

(iii) Rule or set builder form method

SUBSET :

A set S is said to be a subset of T if every element of S is an element of T . It is written as S ⊆ T

EVALUATION

Here the given set is

A = { 1, 3, 4, 7, 8}

CHECKING FOR OPTION : 1

The set is {7, 3, 1 , 8}

Since every element of the above set is an element of the set A

So the above set is a subset of A

CHECKING FOR OPTION : 2

Here the set is {1, 3, 4, 7, 8}

Since every element of the above set is an element of the set A

So the above set is a subset of A

CHECKING FOR OPTION : 3

Here the set is {1, 3, 5, 7}

5 is an element of {1, 3, 5, 7} but not an element of A

So {1, 3, 5, 7} is not a subset of A

CHECKING FOR OPTION : 4

Here the set is {3, 4, 7 }

Since every element of the above set is an element of the set A

So the above set is a subset of A

FINAL ANSWER

Hence the correct option is 3. {1, 3, 5, 7}

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