Question

We have learned about inclusion exclusion principle for two sets |A ∪ B| = |A| + |B| − |A ∩ B|. We can use same principle for three sets also using ∣ A ∪ B ∪ C ∣ = ∣ A ∣ + ∣ B ∣ + ∣ C ∣ − ∣ A ∩ B ∣ − ∣ A ∩ C ∣ − ∣ B ∩ C ∣ + ∣ A ∩ B ∩ C ∣ Answer the following question survey was conducted in 2006 and they asked about office accessories that they had a PRINTER, a Scanner or LCD. 60 had a PRINTER. 65 had a Scanner; and 50 had LCD. 25 owned PRINTER and Scanner. 30 owned a Scanner and had LCD. 35 owned a PRINTER and had LCD. 95 households had at least one of the three. How many households had all three?

Answer 1

Step-by-step explanation:

sorry don't know the answer

Answer 2

Answer:

lcd (kkkkkkkkkkkoooppppooooiuu