# The following data gives the information on the observed lifetimes (in hours) of 225 electrical components:Determine the modal lifetimes of the components

As per the question:

Modal class = 60-80

l = 60

h = 20

f1 = 61

f0 = 52

f2 = 38

$Mode = 60+(\frac{61-52}{(2\times61)-52-38})\times20$

$Mode = 60+\frac{9\times20}{32}$

Or Mode = 60 + 5.625

or Mode = 65.62

Thus, the modal lifetime of 225 electrical components is 65.62 hours

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