Mathematics
Undergraduate
このふたつの問題、何が違うのかよくわからないです🥺🥺🥺解説お願いします！！！！
=8
= 8.
した人の
(2) n(An B) = n(AUB) - n(ANB)-n(ANB)
(e)
すると
=42-3-15=24
(3) n(A) = n(AUB) - n(ANB)
.8470=42-15=27
ol
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