Options:
A.
B.
C.
D.
Sign in to view the correct answer and detailed explanation.
Ulearngo is an independent study app. It is not affiliated with, endorsed by, or representing University of Ilorin (UNILORIN). Always confirm official exam, admission, registration, syllabus, timetable, and result information from UNILORIN official website.
Earlier discussion
1 older comment kept for context.
Timothy Godspower
Let the total age be X
1/4 of X = x/4
1/5 of X = x/5
1/3 of X = x/3
Therefore
X - 13 = x/4 + x/5 + x/3
X - 13 = 15x + 12x + 20x / 60
Cross multiply
60x - 780 = 47x
Collect like terms
60x - 47x = 780
13x = 780
X = 60. That is.