Multiple Choice Question

The average age of 26 students of a class is 26 years. If the age of the teacher is also included, the average age of the whole group becomes 27 years. The age (in years) of the teacher is:

A

54
B

50
C

57
D

53

Explanation:

Students total = 26×26 = 676 ⇒ With teacher = 27×27 = 729 ⇒ Teacher age = 53.

Finding Something Else?

Read the Complete Topic

This question belongs to the set "RRB Group D 2025 Question Paper – 27 November Shift 1 | Set 2 (Q26–Q50) Mathematics". Click below to read detailed notes and attempt the full quiz.

View Full Post →

Try These Similar MCQs

P is any point inside the rectangle ABCD. If PA = 98 cm, PB = 91 cm and PC = 21 cm, then the length of PD (in cm) is equal to:

The vertices of a convex pentagon (in order) are P(0,0), Q(6,0), R(8,3), S(4,7), T(0,4). Find the area of the pentagon.

A metal rod is divided into three parts A, B and C. The lengths of A and B are in the ratio 9 : 20, and the lengths of C and B are in the ratio 5 : 11. If the difference between the lengths of A and C is 10 cm, find the total length (in cm) of the metal rod.

Soniya got married 15 years ago. Her present age is 8/5 times her age at the time of her marriage. Her sister was 8 years younger to her at the time of her marriage. Find the present age of her sister.

If Δ × 2.2 + 0.33 × 3/4 − 1/20 × 0.55 = 0.99, then the value of Δ is:

If 20% of a number is added to 90, then the result is the same number. 80% of the same number is:

Explore Related Study Material

$Math Quiz : General aptitude test on Mathematics for competitive Exams$ Test

Math Quiz : General aptitude test on Mathematics for competitive…

May 23, 202021.7k views View →

Note

Mathematics: Profit And Loss, Solved Questions

May 13, 20201.3k views View →

Note

Profit, Loss And Discount – Examples And Tricks To Solve

May 12, 20203k views View →

$Class 5 Maths MCQ Test | NCERT Based Mathematics Questions (Set 1)$ Quiz

Class 5 Maths MCQ Test | NCERT Based Mathematics Questions…

Feb 04, 2026112 views View →