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SAT Math Videos 353 videos

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SAT Math: Predicting Survey Results Using Subtraction and Percentages 1 Views


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Description:

Jack surveyed a random sample of people on the street about whether they preferred winter or summer weather, and every person responded with one of these two options. Of the 35 people he surveyed, 34.3% said they preferred summer weather. If he had surveyed 250 people, approximately how many people would have said they prefer winter weather?


Transcript

00:00

Yeah Whoa Okay Next T math for shoppers Here we

00:06

go Jack surveyed a random sample of people on the

00:08

street about whether they preferred a winter or summer weather

00:11

and every person responded with one of these two options

00:14

Of the thirty five people he surveyed thirty four point

00:16

three percent said they preferred summer weather if he had

00:19

survey two hundred fifty people approximately how many people would

00:22

have said they prefer winter weather All right so we

00:27

got a clearly a ratio here Thirty five people is

00:30

in the denominator Thirty four point three percent said they

00:33

preferred summer weather So all we have to do is

00:36

take one minus that point three four three There is

00:41

going to get us about sixty five point seven percent

00:44

which we're going to take as point six five seven

00:46

and multiply by two Fifty to get us the right

00:49

answer We know real quickly it's going to be D

00:51

because the other answers were way too small But let's

00:54

think it through Summer has a sweaty scorching weather but

00:58

the beach is nice Winter has bone chilling sneezy weather

01:01

about Christmas is nice Unfortunately both seasons can be s

01:04

a T study time Yeah Welcome You'll hang out without

01:07

serious question is asking about how many of the two

01:09

hundred fifty person group would like winter Well be honest

01:12

since we're already given the thirty four point three percent

01:14

those thirty five people are irrelevant So that is thirty

01:17

four point three percent like summer And yes that's a

01:20

sixty five point seven percent like winter So we multiply

01:23

that number by two fifties we said and we get

01:25

the hundred sixty four People would say they prefer winter

01:29

bone chilling and sneezy as it is Answer is d

01:32

All right Anyone else feel like listening Teo Justin Timberlake

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