Hi Bunuel/ Karishma,
From 'how many of the 45 students applied to schools in only one region?', do we need to find at least 1 region or exactly 1 region.?
n(At least one set) = n(A) + n(B) + n(C) – n(A and B) – n(B and C) – n(C and A) + n(A and B and C)
n(Exactly one set) = n(A) + n(B) + n(C) – 2*n(A and B) – 2*n(B and C) – 2*n(C and A) + 3*n(A and B and C)
Also, can the Exactly one set formula can be written as below.?
n(Exactly one set) = n(A) + n(B) + n(C) -2(d+e+f) +3(g)
...
From 'how many of the 45 students applied to schools in only one region?', do we need to find at least 1 region or exactly 1 region.?
n(At least one set) = n(A) + n(B) + n(C) – n(A and B) – n(B and C) – n(C and A) + n(A and B and C)
n(Exactly one set) = n(A) + n(B) + n(C) – 2*n(A and B) – 2*n(B and C) – 2*n(C and A) + 3*n(A and B and C)
Also, can the Exactly one set formula can be written as below.?
n(Exactly one set) = n(A) + n(B) + n(C) -2(d+e+f) +3(g)
...
