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Class 10 · Mathematics
→If U = {1, 2, ..., 50} and A = {x : x ∈ U, the last digit of x is 2 or 7}, what is n(A′)?
Class 10 · Mathematics
→If A ⊆ U, what is (A′ ∩ A)′ equal to?
Class 10 · Mathematics
→If U = {1, 2, ..., 24}, A is the set of odd numbers in U, and B is the set of prime numbers in U, what is A ∩ B′?
Class 10 · Mathematics
→If U = R, A = [−7, −1), and B = (−3, 5], what is (A ∩ B)′?
Class 10 · Mathematics
→If U = {1, 2, ..., 100}, A = {x ∈ U : 10 divides x}, and B = {x ∈ U : 15 divides x}, what is n(A′ ∪ B′)?
Class 10 · Mathematics
→If U = {1, 2, ..., 18}, A = {2, 4, 6, 8, 10, 12, 14, 16, 18}, and B = {1, 2, 3, 5, 8, 13}, what is A′ ∩ B′?
Class 10 · Mathematics
→If U = {1, 2, ..., 64} and A = {x : x ∈ U, x = 2^k where k ∈ N₀}, how many numbers divisible by 4 are in A′?
Class 10 · Mathematics
→If U = R and A = {x ∈ R : x² + 2x − 8 < 0}, what is A′?
Class 10 · Mathematics
→If A ∪ B′ = U, which of the following statements must be true?
Class 10 · Mathematics
→If U = {1, 2, ..., 20}, A = {x ∈ U : x ≤ 12}, and B = {x ∈ U : x is odd}, what is A' ∩ B?
Class 10 · Mathematics
→If n(U) = 300, n(A') = 120, n(B') = 150, and n(A' ∪ B') = 210, what is n(A ∪ B)?
Class 10 · Mathematics
→If U = {x ∈ Z : -5 ≤ x ≤ 15} and A = {x ∈ U : x ≡ 2 (mod 5)}, what is n(A')?
Class 10 · Mathematics
→If U = {1, 2, ..., 36} and A = {x : x ∈ U and x is not prime}, how many elements are in A'?
Class 10 · Mathematics
→If U = ℝ, A = (-2, 6], and B = [0, 9), what is A' ∪ B'?
Class 10 · Mathematics
→If U = {1, 2, ..., 72}, A = {x ∈ U : 4 divides x}, B = {x ∈ U : 6 divides x}, and C = {x ∈ U : 9 divides x}, what is n((A ∪ B ∪ C)')?
Class 10 · Mathematics
→If A ∩ B = A ∩ B', which conclusion must be true?
Class 10 · Mathematics
→Let U = {1, 2, ..., 30}, A = {x : x ∈ U and x is a perfect square}, and B = {x : x ∈ U and x is even}. What is A' ∩ B?
Class 10 · Mathematics
→If the universal set is U = R and A = {x ∈ R : |x + 1| ≥ 4}, what is A'?
Class 10 · Mathematics
→If the universal set U = {a, b, c, d, e, f, g, i}, A = {a, c, f}, and B = {b, c, e, i}, what is the value of (A ∪ B)'?
Class 10 · Mathematics
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