Answer:
The answer is A
Step-by-step explanation:
cross mutliply
1×6=6
1×3=3
divide the answers
result: 2
I hope this helps
Answer: Option 'c' is correct.
Step-by-step explanation:
Since we have given that
n = 1200
x = 32% of 1200
So, 
We need to find 95% confidence interval.
so, z = 1.96
So, margin of error would be

So, Interval would be

Hence, Option 'c' is correct.
Answer:
5/7
Step-by-step explanation:
..........solve it like an equation
4 houses in 3 days
4 x 5 houses in 3 x 5 days
20 hosues in 15 days