Question

Miguel is in charge of planning a reception for 1600

people. He is trying to decide which snacks to buy. He has asked a random sample of people who are coming to the reception what their favorite snack is. Here are the results.
FAVORITE SNACK
Brownies: 39
Pretzels: 15
Potato Chips: 69
Other: 60
Based on the above sample, predict the number of the people at the reception whose favorite snack will be brownies. Round your answer to the nearest whole number. Do not round any intermediate calculations.

Answer 1

easy
we use fractions or seomthing
find how many people liked brownies out of all those surveyed
find how many people survayed
surveyed=39+15+69+60=183
brownies=39
39/183=13/61=brownies/all surveyed

13/61 will be liking brownies

13/61 out of 1600
13/61 times 1600
20800/61=people who like brownies
340.98=people who like brownies
about 341 people like brownies

Answer 2

So if 39 people said brownies, 15 said pretzels, 69 said potato chips, and 60 said another food, that's 183 people total.
Put in percents;
Brownies: 21.3%
Pretzels: 8.2%
Potato Chips: 37.7%
Other: 32.8%

If you multiply these figures by the 1600 people coming, and you have your predictions.

Brownies: 21.3% * 1600 = 340.8 => 341 people
Pretzels: 8.2% * 1600 = 131.2 => 131 people
Potato Chips: 37.7% * 1600 = 603.2 => 603 people
Other: 32.8% * 1600 = 524.8 => 525 people