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Answer:

2.

B =200

R = 63%

P = 126

P = B X R

= 200 X 63%

= 200 X 0.63

P = 126

Therefore, there are 126 people who knew how to swim.

3.

B =50

R = 20%

P = 10

P = B X R

= 50 X 20%

= 50 X 0.20

P = 10

Therefore, there are 10 people with pet dog.

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