Answer:
3 pieces
I hope this helps
Step-by-step explanation:
X(1/3) = 1
x/3 = 1
X= 1×3 = 3
85/100=34/?
85÷2.5=34
100÷2.5=40
34/40=34/? ?=40
there were 40 questions
Omg! fellow k12 student:)
Answer:
2 & 20
Step-by-step explanation:
100 x 2= 200
20 x 10= 200
Since we are not given any information about the proportion, we will assume the sample proportion to be 0.50
so,
p = 0.50
The Error is 10% percentage point. This means that on either side of the population proportion the error is 5% so E = 0.05
z = 1.645 (Z value for 90% confidence interval)
The margin of error for population proportion is calculated as:
This means 271 students should be included in the sample