Answer:
I think you attached the wrong pdf! The pdf is about world history. Isn't this question regarding maths?
Step-by-step explanation:
Answer:
(c) Multistage sampling
Step-by-step explanation:
Multistage sampling is a technique of sampling in which the population is divided in different stages or groups with the goal of reducing the sample size at each stage.
Here, multistage sampling is being used to obtain the sample of undergraduate students in the United States.
Hence, the correct option is (c), Multistage sampling.
Answer:
3/2
Step-by-step explanation:
1/2 ÷ 1/3
Keep - Change - Flip
Keep 1/2
Change ÷ to ×
Flip 1/3 to 3/1
1/2 × 3/1 = 1 · 3/2 · 1 = 3/2
Answer:
68
Step-by-step explanation:
4 out of 12 are blue.
Then 8 out 12 are not blue.
8 out of 12 is the same as the fraction 8/12 which can be reduced to 2/3.
2/3 of the birds are not blue.
2/3 of 102 = 2/3 * 102 = 68
Answer: 68
