Question
The average age of a group of eight children is 9 years.
Two children, whose ages were 7 years more and 5 years more than the average age, left. Two new children, whose average age is 4 years more than the given average age, join the group. Find the new average age.Solution
Initial sum of the ages of 8 children = 9 x 8 = 72 years Ages of the children leaving: 9 + 7 = 16 years and 9 + 5 = 14 years, Sum of the ages of children leaving = 16 + 14 = 30 years Sum of the ages after two children left = 72 - 30 = 42 years Sum of the ages of 2 new children = (9 + 4) x 2 = 26 years Total sum of the ages with new children = 42 + 26 = 68 years Number of children now= 8 - 2 + 2 = 8 New average age = 68/8 = 8.5 years
Which of the following is not an international airport in India?
Which of the following statements with reference to the Atal Vayo Abhyuday Yojana (AVYAY) is/are correct?
1. Fulfil basic needs of destitute e...
Fiscal Deficit means ______.
Who is the owner of General Insurance Corporation of India Limited (GIC Re)?
The leading financial services and solutions company Paytm has raised India's largest IPO of valuations Rs _______ crores?
Which of the following is India's largest underground pipeline?
Which of the following is NOT true regarding corporate social​ responsibility?
Who among the following applied European theatrical techniques to Indian Classical dance with folk and tribal dance?
Lal Kangaroo is the national animal of which of the following nations?
India's first repository for life science data was established in which city?