The sum of the present ages of a mother and his daughter is 60 years. five years ago, mother's age was four times the age of the daughter. so now the daughter's age will be?
Answer: C
Let the present ages of daughter and mother be \(x\) and \((60-x)\) respectively .
Then, \((60 - x) - 5= 4(x - 5)\)
\(\Rightarrow\) \(55 - x = 4x - 20 \)
\(\Rightarrow \) \(5x=75\)
\(\Rightarrow x=15\)