I want to know the answer to the following question:
What was the average number of people in a Plymouth household?
All the background I'm provided with is that "From the 2011 Census, the Office for National Statistics published that Plymouth's unitary authority area population was 256,384; 15,664 more people than that of the last census from 2001, which indicated that Plymouth had a population of 240,720.". Is that enough to answer the question?