Question
There are 4 children in a family. The average age of the
children is 9 years. If the present age of their mother and father is added, the average age of the whole family becomes 15 years. If the age of the father is 4 years more than that of the mother, find the present age of the mother.Solution
ATQ, Let the present age of the mother be x years. So, the present age of the father = x+4 years. Sum of the present age of the four children = 9×4=36 years. Sum of the present age of the whole family = 36+x+(x+4)=15×6. 2x+4=90−36 2x=50 x=25 Therefore, the present age of the mother = 25 years.
The term ‘Jerk’ is associated with which one of the following games?
When Pitt's India Act was passed?
Which of the following sets the scope, timing and direction of the audit, and guides the development of the more detailed audit plan?
Which of the following was the founder of Pal Empire?
What does MSP (Minimum Support Price) aim to achieve for farmers? Â
In how many years will ₹7,500 double at 8% simple interest ?
The spring festival celebrated by the Konyak tribe of Nagaland is known as ______.
Who among the following won the World Food Prize 2020?
Micro Units Development Refinance Agency (MUDRA) is related to:
Which of the following organisms belongs to phylum Apicomplexa?
