Efficiency of Binary Classifier


Difficulty: 2 | Problem written by mesakarghm
Problem reported in interviews at


We can calculate the efficiency of a Binary Classifier through its confusion matrix. The efficiency of a confusion matrix is defined as the sum of its Sensitivity, Specificity and its Accuracy divided by 3. 

\(Efficiency = {(Sensitivity + Specificity + Accuracy) \over 3}\)

Write a function efficiency(TP,TN,FP,FN) which calculates and returns the efficiency of the binary classifier. 


TP -> True Positive 

TN -> True Negative

FP -> False Positive

FN -> False Negative

Sample Input:
<class 'int'>
TP: 100
<class 'int'>
TN: 50
<class 'int'>
FP: 10
<class 'int'>
FN: 9

Expected Output:
<class 'float'>

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abhishek_kumar • 3¬†months ago


Here you have to provide efficiency percentage. Not in Fraction form.


Input Test Case

Please enter only one test case at a time
numpy has been already imported as np (import numpy as np)