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3 years ago

A bag contains 30 lottery balls numbered 1-30 a ball is selected, not replaced,then another is drawn.find each probability

1 answer:

6 0

The probability of the first event with x possible outcomes is equal to x/30. Also, the probability of the second event with y possible outcomes is y/29.

(1) P of 2 digit number, 21/30
P that the number is 4 is 1/29
Multiplying both probabilities will give us 7/290

(2) P that number is 19 is 1/30
P that the number is multiple by 4 is 6/29
The answer is 1/145

(3) P that number is 24 is 1/30
P that number is less than 15 is 14/29
The answer should be 7/435.

(4) P that number 1st number is perfect square is 5/30
P that second number is perfect square is 4/29.
The answer is 2/87.

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IQ scores based on the Stanford-Binet IQ test are normally distributed with a mean of 100 and standard deviation 15. If you wer

lianna [129]

Answer:

95 intervals

Step-by-step explanation:

Given that

population mean = 100

standard deviation = 15

number of interval that involve the mean for 95% confidence interval is calculated as

We know that when we measure the 99 percent confidence interval, 99 outof 100 confidence interval are required to provide the mean population.

similarly

Assuming we measure a confidence interval of 95 percent, then we should expect 95 out of 100 confidence interval to provide the mean population therefore, answer is 95

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3 years ago

Which relationship has a zero slope

vesna_86 [32]

Answer:

The first table.

Step-by-step explanation:

A slope of 0 means that as x increases, y stays the same. In the first table, all of our y-values are 2; this means that y stays constant.

To prove it, we use our formula for slope:

$m=\frac{y_2-y_1}{x_2-x_1}$

The slope of the line between the first two points is

(2-2)/(-3--1) = 0/-2 = 0

The slope of the line between the second pair of points is

(2-2)/(-1-1) = 0/-2 = 0

The slope of the line between the next pair of points is

(2-2)/(1-3) = 0/-2 = 0

Since the slope between each pair of points is 0, the slope of the entire line is 0.

4 0

3 years ago

Read 2 more answers

What type of insurance can be waived (refused) if a driver feels that his/her car is not worth insuring? A. collision B. compreh

Mars2501 [29]

Answer:

i believe its a

Step-by-step explanation:

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2 years ago

A car can travel 476 miles on 14 gallons of gas.Write an equation relating the distance d to the number of gallons of gas does t

bazaltina [42]

Mpg = 476/14 = 34 mpg

d = 578 miles = (34 mpg)(x gallons)

578 = 34x

x = 578/34 = 17 gallons

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3 years ago

What is the area of a circle with the radius of 3.2?

Daniel [21]

The area of the circle is A = π*r²
Given r = 3.2 and π is approximately 3.14, thus
A = 3.14*(3.2)²
A = 32.1536 or 32.15 (rounded off to hundredths place)

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3 years ago