PLEASE HELP FOR BRAINLIEST! ;)

The answer for 7 is 525

the answer for 8 is a) yes its a random sample and b) the question is not biased because the question is a wide topic with many possible answers.

Step-by-step explanation:

for 7 cross multiply 3000 over x and 200 over 35 and divide the fraction.

for 7, it's a random sample because a) you didn't ask all the boys and b) it's a wide topic with many answers.

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