Answer:
<em>The sample size 'n' = 721</em>
<em>Number of cars 'n' = 721</em>
Step-by-step explanation:
<u><em>Explanation</em></u>:-
<em>Given Population proportion 'p' = 0.40</em>
<em>Given Margin of error = 0.03</em>
<em>90% of level of significance </em>
<em> </em><em></em>
<em>The Margin of error is determined by</em>
<em></em><em></em>
on calculation , we get
0.03√n = 0.8058
squaring on both sides , we get
n = 721.45≅721
<u><em>conclusion</em></u>:-
<em>The sample size 'n' = 721</em>
<em>Number of cars 'n' = 721</em>
Answer:
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Step-by-step explanation:
Answer:
What problem?
Step-by-step explanation:
I dont see anything
Answer:
number of students in a van = 8
number of students in a minibus = 22
Step-by-step explanation:
Let
x = number of students in a van
y = number of students in a minibus
8x + 8y = 240 (1)
4x + y = 54 (2)
Multiply (2) by 8 to eliminate y
4x + y = 54 ×8
32x + 8y = 432 (3)
8x + 8y = 240 (1)
32x + 8y = 432 (3)
Subtract (1) from (3)
32x - 8x = 432 - 240
24x = 192
Divide both sides by 24
x = 192 / 24
= 8
x = 8 students
Substitute x = 8 into (2)
4x + y = 54
4(8) + y = 54
32 + y = 54
y = 54 - 32
= 22
y = 22 students
number of students in a van = 8
number of students in a minibus = 22