If the set A - x - x - where x is a perfect square x - N and x - 30- Then n A isA- 4B- 5C- 3D- 6

The correct option is B 5 Given {x:x = where x is a perfect square x ∈ N and x ≤ 30}. Perfect squares less then 30 are 1,4,9,16, 25 ⇒ A = {1, 4, 9,16, 25} ...

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Standard VI

Mathematics

Cardinality

If the set A ...

Question

If the set $A = {x : x = where x is a perfect square x \in N and x \leq 30}$ . Then n(A) is

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Solution

The correct option is A
5

Given ${x : x = where x is a perfect square x \in N and x \leq 30}$ .

Perfect squares less then 30 are 1,4,9,16, 25

$\Rightarrow A = {1, 4, 9, 16, 25} \Rightarrow n (A) = 5$

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If the set A={x:x= where x is a perfect square x∈N and x≤30}. Then n(A) is

The correct option is A 5 Given {x:x= where x is a perfect square x∈N and x≤30}. Perfect squares less then 30 are 1,4,9,16, 25 ⇒A={1,4,9,16,25}⇒n(A)=5

If the set $A = {x : x = where x is a perfect square x \in N and x \leq 30}$ . Then n(A) is

The correct option is A
5

Given ${x : x = where x is a perfect square x \in N and x \leq 30}$ .

Perfect squares less then 30 are 1,4,9,16, 25

$\Rightarrow A = {1, 4, 9, 16, 25} \Rightarrow n (A) = 5$