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:

1,3,5,7 is a not a subset of set A

Answer 2

Solution :-

given ,

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

So, some subset of A are :-

• { } = Empty set is a subset of every set .
• {1}, {3}, {4}, {7}, {8}
• {1,3}, {1,4}, {1,7}, {1,8}, {3,4},{3,7}, {3,8}, {4,7}, {4,8}, {7,8}
• {1,3,4,7,8} = Every set is a subset of itself .

checking given options now, we get,

(1) {7,3,1,8}

→ A = {1, 3, 4, 7, 8}

since all the elements of given set are present in set A , therefore, we can conclude that, Option (1) is subset of set A .

(2) {1, 3, 4, 7, 8}

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

since all the elements of given set are present in set A , therefore, we can conclude that, Option (2) is subset of set A .

(3) {1, 3, 5, 7}

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

since element 5 of given set is not present in set A , therefore, we can conclude that, Option (3) is not subset of set A .

(4) {3, 4, 7 }

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

since all the elements of given set are present in set A , therefore, we can conclude that, Option (4) is subset of set A .

Hence, Option (3) is correct answer .

Learn more :-

A={2,5,7,8,9,} and B={7,8,10,11} then A ∆ B

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