in one city there are 1,780 5 year old children of whom 556 live with one parent only. among a sample of 615 of the 5 year old children fro this city, 226 live with one parent only. find the population proportion of 5 year olds who live with only one parent.

a. 0.35

b. 556

c. 0.37

d. 0.31