Question

Для множеств A={30,31,32,...,45}и B={40,41,42...,55} вычислите n(AUB)

Answer 1

A∩B = {40, 41, 42, 43, 44, 45}
n(A∩B) = 6
n(A) = 16
n(B) = 16
n(AUB) = n(A) + n(B) - n(A∩B) = 16 + 16 - 6 = 16 + 10 = 26

Ответ: 26