After 225 days the activity of a sample ...

After 225 days the activity of a sample is 4000 decay/s. The activity reduces to 2000 decay/s after another 75 days. The initial activity of the sample is

16000 decay/s

20,000 decay/s

24,000 decay/s

32,000 decay/s

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AAKASH INSTITUTE ENGLISH-TEST 3-EXAMPLE

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