A single individual starts a rumour in a community of 200 people. the rumour spread at a rate proportional to the number of people who have not yet heard the rumor. After 2days 10 people have heard the rumor
If "N" denotes the number of people who have heard the rumor, then "200-N" represents the number of people who haven’t heard the rumor.
Then
Integrate
1.
2.
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