যদি U = {x : 0 < x ≤ 10, x ∈ N}, A = {x : x , 3 এর গুণিতক এবং x ≤ 10} হলে n(A^c) = কত?

যদি U = {x : 0 < x ≤ 10, x ∈ N}, A = {x : x , 3 এর গুণিতক এবং x ≤ 10} হলে n(A^c) = কত?

সমাধান:
U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
A = {3, 6, 9}

A^c = U - A
= {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} - {3, 6, 9}
= {1, 2, 4, 5, 7, 8, 10}

n(A^c) = 7