Bunuel wrote:

The population of a bacteria colony doubles every day. If it was started 9 days ago with 2 bacteria and each bacteria lives for 12 days, how large is the colony today?

A. 512

B. 768

C. 1024

D. 2048

E. 4096

This question was a sitter, still i got this wrong not because I didn't know the concepts well, but because I did a silly mistake. Since the information provided is of 9 days ago, I calculated the answer for 9 days itself. The calculation should be done for n+1 days.

It started with 2 bacteria, thus today, the number of bacteria will be \(2^10\) \(=1024\)

The other information about the lives of bacteria is redundant, this information would have been useful, had the question asked for more than 11 days.

Ans - 1024

Choice C

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