Question

If A={1,2,3,4,5,7,9,11} find n (A)

Answer 1

Given:

A={1,2,3,4,5,7,9,11}

To find:

n(A)

Solution:

We can find the solution by following a few simple steps-

We know that in Sets, n(A) refers to the number of elements present in the set.

Here, the given set is A.

Elements of A are 1, 2, 3, 4, 5, 7, 9, 11.

The number of elements in A={1,2,3,4,5,7,9,11} is 8.

So, n(A)= The number of elements present in set A.

n(A)=8

Therefore, n(A) is equal to 8.

Answer 2

Given:

A = {1,2,3,4,5,7,9,11}

To Find: n(A)

Calculation:

• A set in maths is defined as the collection of elements or collection of outcomes of an event.
• These elements can be either variables, numeric values, shapes, points, symbols etc.
• Here, A is a set and has 1, 2, 3, 4, 5, 7, 9, 11 are its elements which are numeric values.
• n(A) is the number of elements in set A and it is equal to 8 i.e. there are 8 numeric values in the set A.

Answer:

n(A) = 8.