Question

in a carton 95% bulbs are unbroken and remaining are broken if number of Broken bulbs are 7 then find the number of unbroken bulb

Answer 1

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Here is the solution:

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Find the percentage of broken bulbs:

100 - 95 = 5%

Find the number of unbroken bulbs:

Broken bulbs = 5%

Broken bulbs = 7

5% = 7

1% = 7 ÷ 5 = 7/5 bulbs

95% = 7/5 x 95= 133

Answer: There are 133 unbroken bulbs.

Answer 2

95% are unbroken. Means 5% are broken.
i.e 7 bulbs =5%
X bulbs =100%
100*7/5=X
X =140.

i.e there are 140 total bulbs.
Unbroken bulbs = 140-7
=133.