The only people in an auditorium are sophomores, juniors, and seniors. the ratio of the number of sophomores to the number of ju
niors in the auditorium is 4 to 3. the ratio of the number of juniors to the number of seniors in the auditorium is 5 to 7. the total number of people in the auditorium is 448. how many juniors are in the auditorium?
I think the current age of the child is 16 and the father is 40. That would mean 4 years ago the father was 36 and the child was 12. This makes the father 3 times as old as his son four years ago.