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4 years ago

Use technology or a z-score table to answer the question.

Mathematics

1 answer:

Levart [38]4 years ago

6 0

Answer: A:60%

Step-by-step explanation:

Since the scores for a golf tournament are normally distributed, we would apply the formula for normal distribution which is expressed as

z = (x - µ)/σ

Where

x = scores for the tournament.

µ = mean score

σ = standard deviation

From the information given,

µ = 210

σ = 80

We want to find the probability percent of golfers that scored less than Ella. It is expressed as

P(x < 230)

z = (230 - 210)/80 = 0.25

Looking at the normal distribution table, the probability corresponding to the z score is 0.5987

Therefore, the percent of golfers that scored less than Ella is

0.5987 × 100 = 59.87

Approximately 60%

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The Line graph shows the number of marks Stacey scorer in her homeworks.

weqwewe [10]

Given:

The line graph shows the number of marks Stacey scored in her homeworks.

We need to determine the Stacey's mean score.

Mean score:

The total number of marks is given by

$(0\times 4)+(1 \times 5)+(2\times 3)+(3\times 4)+(4 \times 3)+(5 \times 1)$

Simplifying, we get;

$0+5+6+12+12+5=40$

Thus, the total number of marks is 40.

Sum of the number of marks scored is given by

$4+5+3+4+3+1=20$

Thus, the sum of the marks scored is 20.

The mean is given by

$Mean=\frac{40}{20}$

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Therefore, Stacey's mean score is 2 marks.

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3 years ago

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3 years ago

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Mariana [72]

Answer:

Step-by-step explanation:

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2 years ago

Pls help if you only know the correct answer! Thanks!

andrey2020 [161]

Answer:

A-1.5

B-(-1/3)

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You have a bag of 12 marbles. Four are blue, 6 are green, 2 are red, and the others are yellow. What is the probability of drawi

8090 [49]

Answer:

$Probability = \frac{1}{11}$

Step-by-step explanation:

Given

$Blue = 4$

$Green = 6$

$Red = 2$

$Total = 12$

Required

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This is calculated as follows:

$Probability = P(Red\ and\ Green)$

$Probability = P(Red)\ and\ P(Green)$

$Probability = \frac{n(Red)}{Total} * \frac{n(Green)}{Total - 1}$

We used Total - 1 because it's a probability without replacement:

$Probability = \frac{2}{12} * \frac{6}{12- 1}$

$Probability = \frac{2}{12} * \frac{6}{11}$

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$Probability = \frac{1}{11}$

Hence, the required probability is 1/11

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3 years ago