UPSKILL MATH PLUS

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The following data gives the information on the observed lifetimes (in hours) of \(225\) electrical components :
 
Lifetimes (in hours) \(0-20\) \(20-40\) \(40-60\) \(60-80\) \(80-100\) \(100-120\)
Frequency \(10\) \(35\) \(52\) \(61\) \(38\) \(29\)
 
Determine the modal lifetimes of the components.
 
Answer:
 
Mode \(=\)
 
[Note: Enter the answer upto \(2\) decimals.]