There are 30 students in a class. The average age of first 10 students is 12.5 y

Question

There are 30 students in a class. The average age of first 10 students is 12.5 years. The average age of the remaining 20 students is 13.1 years. The average age (in years) of the students of the whole class is :

Options:

A . 12.5 years

B . 12.7 years

C . 12.8 years

D . 12.9 years

Answer: Option D

Submit Your Solution Below and Earn Points !

Next Question

Submit Solution

More Questions on This Topic :

Question 1. The average of marks in Mathematics for 5 students was found to do 50. Later, it was discovered that in the case of one ....48 were misread as 84. The correct average is :

Question 2. The average marks obtained by a class of 60 students is 65. The average marks of half of the students is found to be 85.....85. The average marks of the remaining students is :

Question 3. In the first 10 overs of a cricket game, the run rate was only 3.2. The run rate in the remaining 40 overs to reach the ....overs to reach the target of 282 run is :

Question 4. The average height of 30 boys out of a class of 50 is 160 cm. If the average height of the remaining boys is 165 cm, the....average height of the whole class (in cm) is :

Question 5. In an exam, the average marks obtained by Jhon in English, Math, Hindi and Drawing were 50. His average mark in Maths, S....seven subjects is 58, his score in Maths was -

Question 6. 30 pens and 75 pencils altogether were purchased for Rs. 510. If the average price of a pencil was Rs. 2, what was the a....2, what was the average price of a pen ?

Question 7. The average age of 30 students of a class is 14 years 4 months. After admission of 5 new students in the class the avera....average age of the remaining 4 new students is :

Question 8. The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was....20 years. The present age of the husband is :

Question 9. The average of 10 items was found to be 80 but while calculating, one of the items was counted as 60 instead of 50. Then....of 50. Then the correct average would have been :

Question 10. The average age of four boys A, B, C and D is 5 years and the average age A, B, D, E is 6 years. C is 8 years old. The a....years old. The age of E is (in years) :

Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)

Direction Sense Test Part 1 Reasoning (Hindi)

Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE

Cube & Cuboid Part 1 Reasoning (Hindi)

Data Interpretation (DI) Basic Concept Reasoning (Hindi)

Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)

Sail E0 free webinar Webinars

Real Numbers Part 7 Class 10 Maths

Real Numbers Part 1 Class 10 Maths

Polynomials Part 1 Class 10 Maths

Pie Chart - Test Paper 1 Data Interpretation Reasoning & DI

Tabulation - Test Paper 2 Data Interpretation Reasoning & DI

Test Paper 1 Direction Sense Test Reasoning & DI

ICA , RDIC,GFM Free Modal Test Paper - Non - Technical Branch Old Syllabus 2022 - SAIL Junior Officer E0

GFM Combined 1 Free Revision Test SAIL JO E-0

Submit Solution

More Questions on This Topic :

Latest Videos

Latest Test Papers