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Arte-miy333 [17]
3 years ago
6

Please HELP if you can!

Mathematics
1 answer:
Sonja [21]3 years ago
8 0

Answer:

C 0.0361

Step-by-step explanation:

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B. Stratified sampling, because there are specific subgroups to investigate.

Step-by-step explanation:

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The ratio of cars to trucks is 9:4. The ratio of trucks to SUV's is 12:21. There are 54 cars.
Elenna [48]

Answer:

Number of trucks = 24

Number of SUVs = 24

Step-by-step explanation:

A)

The ratio of cars to trucks is 9:4

The total ratio of cars to trucks is

9+4 = 13

Let x = sum of cars and trucks.

There are 54 cars. Therefore,

x = 54 + t trucks

Number of cars = ratio of cars/ total ratio × sum of cars and trucks. This means,

54 = 9/13 × x

9x / 13 = 54

9x = 13 × 54

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x = 702 / 9 = 78

x = 54 + t trucks = number of trucks = 78 = 54 + t trucks

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Number of trucks = 24

B)

The ratio of trucks to SUVs is 12:21

The total ratio of cars to trucks is

12 + 21 = 33

Let y = sum of trucks and SUVs

There are 24 trucks. Therefore,

x = 24 + s SUVs

Number of trucks = ratio of trucks / total ratio × sum of trucks and SUVs. This means,

24 = 12 / 33 × y

12y / 33 = 24

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66 = 24 + s SUVs

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