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Ivenika [448]
2 years ago
7

Mr. Barnett’s test is normally distributed with a mean of 65 with a standard deviation of five points what is the probability th

at a randomly selected score is greater than 75 points

Mathematics
1 answer:
uranmaximum [27]2 years ago
4 0

Answer: 2.5%

Step-by-step explanation:

Mean score = 65

Standard deviation = 5

Score (x) = >75

Z-score = [(score - mean) ÷ standard deviation]

Z - score = [(75 - 65) ÷ 5]

Z - score = 10 ÷ 5 = 2

P(score higher than 75) = 100 - 95 = 5/2 = 2.5%

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Kira has 22 cards, Randall has 44 cards, and Sean has 34 cards

<u>Solution:</u>

Given that, Randall, Kira and Sean have 100 baseball cards altogether.

Randall has twice as many as Kira and 10 more than Sean.  

We have to find how many baseball cards does each person have?

Now, let the number of cards with Kira be "n", then number of cards with Randall will be "2n"

As Randall has "2n" cards, Sean will have 2n – 10

Now, total cards = 100  

<em>Randall cards + Kira cards + Sean cards = 100  </em>

2n + n + 2n – 10 = 100  

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n = 22

So, kira has 22 cards, then, randall will have 2(22) = 44 cards and cards with sean = 44 – 10 = 34 cards.

Hence, kira has 22 cards, randall has 44 cards, and sean has 34 cards.

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3 years ago
At which price does quantity demanded equal quantity supplied?
yulyashka [42]

the price of the object

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3 years ago
Find the measure of each angle in the triangle.
ValentinkaMS [17]

Answer:

x=26°

Step-by-step explanation:

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6 0
2 years ago
Lines k and n are perpendicular.if the slope of line k is -6,what is the slope of line n?
aleksley [76]

Answer:

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Step-by-step explanation:

Well perpendicular lines are reciprocals of each other,

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<em>Thus,</em>

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<em>Hope this helps:)</em>

3 0
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