The average age of group of 20 girls is 15 years and that of another group of 25

Question

The average age of group of 20 girls is 15 years and that of another group of 25 boys it is 24 years. The average age of the two groups mixed together is :

Options:

A . 19.5 yearas

B . 20 years

C . 21 yearas

D . 21.5 years

Answer: Option B

Submit Your Solution Below and Earn Points !

Next Question

Submit Solution

More Questions on This Topic :

Question 1. From a class of 42 boys, a boy aged 10 years goes away and in his place, a new boy is admitted. If on account of this ch....by 2 months, the age of the newcomer is :

Question 2. In a primary school the average weight of male students is 65.9 kg and the average weight of female students is 57 kg. I....what is the number of female students in the school?

Question 3. The average monthly income of P and Q is Rs. 6000; that of Q and R is Rs. 5250; and that P and R is Rs. 5500. What is P�....and R is Rs. 5500. What is P’s monthly income?

Question 4. The average weight of a group of 75 girls was calculated as 47 kgs. It was later discovered that the weight of one of th....75 girls? ( Rounded off to two digits after decimal).

Question 5. Find the average of the following sets of scores:385, 441, 876, 221, 536, 46, 291, 428....

Question 6. If 25a + 25b = 115, what is the average of a and b?....

Question 7. The average of two numbers is XY. If one number is X, the other is-....

Question 8. The average weight of a class of 24 students is 35 kg. If the weight of the teacher be included, the average rises by 40....by 400 g. The weight of the teacher is -

Question 9. The average age of an adult class is 40 years. 12 new students with an average age of 32 years join the class, thereby d....by 4 years. The original strength of the class was-

Question 10. The average of the first five multiples of 3 is-....

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