Question

if A={3,6,9,15,18} then n(A)=?
1)6
2)18
3)3
4)5​

Answer 1

Answer:

4) 5

Step-by-step explanation:

n(a) refers to the number of elements in a set this contain 5 elements

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Answer 2

Answer:

3)3

Step-by-step explanation:

This is answer A=+3,