N(Car or Bike) = N(Car) + N(Bike) - N(Car + Bike)
N(Car or Bike) = 90-11 = 79
N(Car) = 44
N(Car + Bike) = 12
79 = 44 + N(Bike) - 12
N (Bike) = 47
But this includes people with Bike and Car both.
People with just Bike = 47 - 12 = 35 Pls tell where I am wrong
In a neighborhood having 90 households, 11 did not have either a car or a bike. If 12 households had a both a car and a bike and 44 had a car, how many had bike only?
You did nothing wrong: answer B is correct. Though after you got that N(Car or Bike) = 79 and N(Car) = 44, you could directly subtract from