Depending upon where you live and on quality of the day care, costs of day care can range from $3,000 to $15,000 year (or $250 to $1250 a month) for one child, according to the Baby Center. Day care centers in large cities like New York and San Francisco are notoriously expensive. Assume that day care costs are normally distributed with a mean equal to $9,000 and a standard deviation equal to $1,800.
What percentage of day care centers cost between $7,200 and $10,800?