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aniked [119]
3 years ago
11

Beatriz takes a simple random sample of 350350350 orders from the more than 500050005000 total orders to her store and finds tha

t 12\, percent of the sampled orders were returned. Assuming that it is really 9\%9%9, percent of all orders to her store which were returned, what is the approximate probability that more than 12\, percent of the sampled orders would have been returned
Mathematics
1 answer:
nekit [7.7K]3 years ago
7 0

Answer:

0.02493

Step-by-step explanation:

We are to Find :

P(p > 0.12) ;

This is equivalent to:

1 - P(p ≤ 0.12)

Using the relation :

1 - P((p - po) / (√(po(1 -po)) / n))

1 -P((Z ≤0.12 -0.09) / (√(0.09(1 -0.09)) / 350))

1 -P((Z≤0.03 / (√(0.09(0.91))/350))

1 - P((Z≤0.03 / 0.0152970))

1 - P((Z≤1.96116)

1 - 0.97507 (from Z probability calculator)

= 0.02493

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What is the quotient of 2 1/9÷3 4/5
Karolina [17]

Answer:

\frac{5}{9}

Step-by-step explanation:

2 \frac{1}{9}  \div 3 \frac{4}{5}  \\  \\  =  \frac{2 \times 9 + 1}{9}  \div  \frac{3 \times 5 + 4}{5}  \\  \\  =  \frac{18 + 1}{9}  \div  \frac{15 + 4}{5}\\  \\  =  \frac{19}{9}  \div  \frac{19}{5}\\  \\  =  \frac{19}{9}  \times  \frac{5}{19} \\  \\  =  \frac{5}{9}

4 0
3 years ago
What is the value of n in the equation - {(2n + 4) + 6 = -9 +4(2n + 1)
Olenka [21]

Answer:

n = 2.5 or n = (5/2)

Step-by-step explanation:

(2n+4) +6 = -9 + 4(2n+1)

first distribute the 4 to the (2n+1)

(2n+4) +6 = -9 + (8n+4)

then add 9 to both sides to cancel out the -9 on the right side

(2n+4) +15 = (8n+4)

next subtract (2n+4) from both sides to cancel out the (2n+4) on the left side combining like terms as you subtract

15 = 6n

then divide 15 by 6 to get your final answer

n = 2.5

or

n = (5/2)

8 0
3 years ago
Please help with this question ​
Basile [38]

Step-by-step explanation:

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m< AOB +m<BOC = 90°

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9x = 90- 18° = 72°

x = 8°

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Round up to get 2.90 because you have a 5 behind the decimal so you could round up

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