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If n(a) = 44, n(b) = 21, and n(a ∩ b) = 4, find n(a ∪ b).

If n(a) = 44, n(b) = 21, and n(a ∩ b) = 4, find n(a ∪ b).
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If n(a) = 44, n(b) = 21, and n(a ∩ b) = 4, find n(a ∪ b).

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User Janessa
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Answer:

n(a or b) = n(a) + n(b) - n(a and b)

= 44 + 21 - 4 = 61

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User Malikah
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