https://knowt.com/note/495215b5-7e45-4550-87e6-6cde249db0bf/Summary-What-is-the-average-age-ofhttps://knowt.com/note/495215b5-7e45-4550-87e6-6cde249db0bf/Summary-What-is-the-average-age-ofhttps://knowt.com/note/495215b5-7e45-4550-87e6-6cde249db0bf/Summary-What-is-the-average-age-of