Question 1. Asked on :13 January 2019:11:49:45 AM
In a class test, the mean marks of boys and girls are respectively 42 and 45. If the mean marks of boys and girls are 44, Find the ratio of the number of boys to the number of girls.
-Added by Akki chauhan Mathematics » Statistics
Answer:
Let 'x' be the number of boys and 'y' be the number of girls.
To find the total marks
The total marks of boys = 42x
The total marks of girls = 45y
Total number of boys and girls = x + y
To find the ratio
The total marks of boys and girls = 44(x + y)
Then we can write
44(x + y) = 42x + 45y
44x + 44y = 42x + 45y
2x = y
x/y = 1/2
Therefore the ratio of the number of boys to the number of girls is 1:2
-Answered by Himanshi Verma On 22 January 2019:05:24:43 PM
Answer:
Let 'x' be the number of boys and 'y' be the number of girls.
To find the total marks
The total marks of boys = 42x
The total marks of girls = 45y
Total number of boys and girls = x + y
To find the ratio
The total marks of boys and girls = 44(x + y)
Then we can write
44(x + y) = 42x + 45y
44x + 44y = 42x + 45y
2x = y
x/y = 1/2
Therefore the ratio of the number of boys to the number of girls is 1:2
-Answered by Master Purushottam On 23 August 2019:11:37:42 PM
You can see here all the solutions of this question by various user for NCERT Solutions. We hope this try will help you in your study and performance.
This Solution may be usefull for your practice and CBSE Exams or All label exams of secondory examination. These solutions or answers are user based solution which may be or not may be by expert but you have to use this at your own understanding of your syllabus.
Our Expert Team reply with answer soon.
Ask Your Question
* Now You can earn points on every asked question and Answer by you. This points make you a valuable user on this forum. This facility is only available for registered user and educators.
Next moment you answer is ready .... go ahead ...
User Earned Point: Select
Sponsers link