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Question
in an examination, 7500 candidate appeared. each offered either physics or chemistry or both. if 75% offered physics and 45% of chemistry how many offered both
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Answer
Let both will tak 'x'
Then out of total
(75-x)+x+(45-x)=100
=>120-x=100
=>x=20%
20% of 7500
20/100*7500=1500
Hence the ans is 1500
