Find the cardinal number of the set — task. Maths TNSB Mentoring, Class 9.

If \(U = \{x: x \in \mathbb{N}\) and \(x < 16\}\), \(A = \)

\{2, 5, 6, 9, 10, 12, 15\}

and \(B = \)

\{5, 6, 10, 15\}

, then find the following:

(i) \(n(A^{\prime})\) \(=\)

(ii) \(n(B^{\prime})\) \(=\)

Did you find an error?

2. Find the cardinal number of the set