Question : Among four students sitting in a row, the average age of the last three students is 48 years and the average age of the first three students is 50 years. If the age of the first student is 56 years, then what is the age of the last student?
Option 1: 30 years
Option 2: 40 years
Option 3: 50 years
Option 4: 60 years
New: SSC MTS 2024 Application Form OUT; Direct Link
Don't Miss: Month-wise Current Affairs | Upcoming Government Exams
New: Unlock 10% OFF on PTE Academic. Use Code: 'C360SPL10'
Correct Answer: 50 years
Solution : The average age of the last three students = 48 The sum of the ages of the last three students = 48 × 3 = 144 The average age of the first three students = 50 The sum of the ages of the first three students = 50 × 3 = 150 Age of first student = 56 Let $x$ be the age of the last student. The difference in ages of the first and last student = 150 – 144 = 6 According to the question, $56 - x= 6$ $\therefore x= 50$ Hence, the correct answer is 50 years.
Application | Cutoff | Selection Process | Preparation Tips | Eligibility | Exam Pattern | Admit Card
Question : The average age of 30 students is 20 years and the average age of 20 other students is 30 years. The average age of the total number of students is:
Question : The average age of 6 members of a family is 20 years. If the age of the servant is included, then the average age increases by 20%. What is the age of the servant?
Question : The average age of Ram and Rahim is 10 years. The average age of Rahim and Ramesh is 15 years. The average age of Ram and Ramesh is 20 years. What is the age of the eldest of the three?
Question : The average age of four brothers is 24 years. If their father is included, the average is increased by 6 years. Find the age of the father (in years).
Question : The average of p, q, r, and s is 30. If the average of p and q is 12, then what will be the average of r and s?
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile