A substance has a half of 3mins. after 6mins. the count rate was observed to…

A substance has a half of 3mins. after 6mins. the count rate was observed to be 400. What was its count rate at zero time?
  • A.
    200
  • B.
    1200
  • C.
    1600
  • D.
    2400
Correct Answer: Option C
Explanation
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