Question

There are 3,000 people at a concert. You survey a random sample of 200 people and find that for 35 of them this is the first concert they have ever attenede. Estimate how many total people are attending their first concert that night

Answer 1

Let x be the estimated number of the 3000 people who are attending their first concert.

35/200 = x/3000

To isolate x, multiply both sides by 3000:

3000(35/200) = 3000(x/3000)
525 = x