350 lightbulbs out of 20000 lightbulbs produced in the factory, will be inspected at the given rate.
Unitary method refers to a process with the help of which we can find the value of a single unit from the value of multiple units and vice versa.
Given: Lightbulbs selected and inspected at random = 7, out of 400 lightbulbs.
To find: Lightbulbs inspected out of 20000 lightbulbs.
By unitary method, we get that:
Out of 400 lightbulbs, 7 lightbulbs are inspected
Out of 20000 lightbulbs, [tex]\frac{7}{400}\times20000[/tex] will be inspected.
[tex]\frac{7}{400}\times20000[/tex] = 350
Thus, 350 lightbulbs out of 20000 lightbulbs produced in the factory.
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