Answer: y=1.4x
Step-by-step explanation:
Step-by-step explanation:
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Answer: 0.13
Step-by-step explanation:
Answer:
the price of each kind of ticket is $22 and $3 respectively
Step-by-step explanation:
Let us assume the adult be x
And, the children be y
Now the equations would be
x + y = $25
x = $25 - y ............(1)
45x + 60y = $1,170
3x + 4y = $78........(ii)
Now put the x value in the equation 2
3($25 - y) + 4y = $78
$75 - 3y + 4y = $78
y = $3
x = $25 - y
= $25 - $3
= $22
hence, the price of each kind of ticket is $22 and $3 respectively
Answer: a. 170 b. 752
Step-by-step explanation:
The formula to find the sample size is given by :-
, where p is the prior estimate of population proportion.
= Two-tailed z-value for (significance level).
E= Margin of error .
Given : Margin of error = 0.03
Confidence level = 90%=0.90
By z-value table :
a) The president's political advisors estimated the proportion supporting the current policy to be : p= 0.06.
Required sample size :
∴ Required sample size = 170
b) If no prior estimate of population proportion is given , then we assume
p= 0.5
Required sample size :
∴ Required sample size = 752