if the first 200 numbers are written down and those are divisible by 2 are deleted and again those divisible by 5 are deleted, how many numbers are left out
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I do no
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for every 2 numbers 1 number is divisible by 2 means 1/2.for every 5 numbers 4 numbers are not divisible by 5 so 4/5
now according to the question
200×1/2×4/5=80
therefore 80 numbers are their remaining
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