Respuesta :
n (Ac) = 45 n (Bc) = 30
n (A) + 45 = 70 n (B) + 30 = 70
n (A) = 70 - 45 n (B) = 70 - 30
n (A) = 25 n (B) = 40
* n [(AUB) - (AПB)] = 35
* 25 + 40 - 2n (AПB) = 35
n (AПB) = 15
n (A) + 45 = 70 n (B) + 30 = 70
n (A) = 70 - 45 n (B) = 70 - 30
n (A) = 25 n (B) = 40
* n [(AUB) - (AПB)] = 35
* 25 + 40 - 2n (AПB) = 35
n (AПB) = 15