###### एनवीएस पीजीटी सीएस 2017 पार्ट-बी

October 14, 2023###### एनवीएस पीजीटी सीएस 2017 पार्ट-बी

October 14, 2023# Aptitude

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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