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Q.

If the number of lotus plants in a pond increases from 20 to 25 in a year, the birth rate is

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a

0.4

b

0.2

c

0.25

d

0.33 

answer is C.

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Detailed Solution

To calculate the birth rate of lotus plants in the pond, we need to use the following formula:
B i r t h space R a t e space equals space fraction numerator T o t a l space N u m b e r space o f space B i r t h s over denominator P o p u l a t i o n space S i z e space x space T i m e end fraction = fraction numerator 25 minus 20 over denominator 20 space cross times space 1 end fraction space equals space 5 over 20 equals 0.25

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