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Dafna11 [192]
2 years ago
6

Can someone help me on this plzzz

Mathematics
1 answer:
Mumz [18]2 years ago
6 0

Answer:

40

Step-by-step explanation:

x= 4 and y = 4

3x + 7y

3(4) + 7(4)

12 + 28

=40

brainliest is appreciated

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350 people visited a zoo the zoo has four types of tickets the manager wants a sample of size 30, stratified by ticket type. how
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Answer:

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Step-by-step explanation:

Whereby tickets are sold to only adults male and female and teenagers, boys and girls, we have the following groups

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Group 4: Teenage girls

In stratified sampling, the types of people that visit the zoo (which is the target population) are identified and the appropriate proportion of each of the identified types is determined such that the sample is representative of the population

Where equal number of each group are observed to have visited the zoo, then, the appropriate sample size of the teenager is found as follows;

Number of groups identified = 4

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Appropriate proportion of each group = 1/4

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Number of teenage girls in the sample = 1/4×30 = 15

Total number of teenagers in the sample = 15 + 15 = 30 teenagers.

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