First, multiply both sides by y to get rid of that y in the denominator.
Then, rearrange it to put it into standard form so you can easily see the values for a, b, and c.
Plug into quadratic formula, and you get this result:
So, y=4, y=8/3
I know that B is 1/5 and 7/8
Answer:
The size of the sample = 1088.90
Step-by-step explanation:
Given that:
The confidence interval level = 0.95
The margin of error = 0.03
Suppose the proportion of the boys and the girls are p₁ and p₂ respectively.
The Standard error S.E of difference is:
Assume p₁ = p₂ = 0.5
The z-critical value at 95% C.I = 1.96
Margin of error = Z_{critical} × S.E
∴
n ≅ 1088.90
Answer:
The answer is 4.
Step-by-step explanation:
Multiply 250 with 1.6%. 1.6% is also written as 0.016.
So pretty much you multiply 250 with 0.016 and you get 4.