एनवीएस पीजीटी सीएस 2017 पार्टबी
October 14, 2023एनवीएस पीजीटी सीएस 2017 पार्टबी
October 14, 2023Aptitude
Question 212

The arithmetic mean of attendance of 49 students of class A is 40% and that of 53 students of class B is 35%. Then the percentage of arithmetic mean of attendance of class A and B is
27.2%


50.25%


51.13%


37.4%

Question 212 Explanation:
The number of class A students are 49
The arithmetic mean of attendance of Class A is 40%
Arithmetic mean of 49 students attendance of Class A is 49×40
The number of class B students are 53
The arithmetic mean of attendance of Class A is 35%
Arithmetic mean of 53 students attendance of Class A is 53×35
The percentage of arithmetic mean of attendance of class A and B is
= (40×49 + 35×53 )/ (49 + 53)=3815/102
= 37.40
The arithmetic mean of attendance of Class A is 40%
Arithmetic mean of 49 students attendance of Class A is 49×40
The number of class B students are 53
The arithmetic mean of attendance of Class A is 35%
Arithmetic mean of 53 students attendance of Class A is 53×35
The percentage of arithmetic mean of attendance of class A and B is
= (40×49 + 35×53 )/ (49 + 53)=3815/102
= 37.40
Correct Answer: D
Question 212 Explanation:
The number of class A students are 49
The arithmetic mean of attendance of Class A is 40%
Arithmetic mean of 49 students attendance of Class A is 49×40
The number of class B students are 53
The arithmetic mean of attendance of Class A is 35%
Arithmetic mean of 53 students attendance of Class A is 53×35
The percentage of arithmetic mean of attendance of class A and B is
= (40×49 + 35×53 )/ (49 + 53)=3815/102
= 37.40
The arithmetic mean of attendance of Class A is 40%
Arithmetic mean of 49 students attendance of Class A is 49×40
The number of class B students are 53
The arithmetic mean of attendance of Class A is 35%
Arithmetic mean of 53 students attendance of Class A is 53×35
The percentage of arithmetic mean of attendance of class A and B is
= (40×49 + 35×53 )/ (49 + 53)=3815/102
= 37.40
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