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ella [17]
4 years ago
9

Here are two coins in a box. one coin is fair, the other has heads on both sides. you draw one coin at random, toss it, and it l

ands up heads. what is the probability that you drew the two-headed coin?
Mathematics
1 answer:
My name is Ann [436]4 years ago
5 0
Heads will come up when you draw the two headed coin 1/2 This 1/2 is for the draw. You have certainty of getting heads from this coin.

On a fair coin, probability of drawing the coin is 1/2
The probability of getting heads is 1/2
The probability is 1/2 * 1/2 = 1/4 with this coin

The total probability = 1/4 + 1/2 = 3/4 or 0.75 of getting heads.
Therefore the probability of drawing the 2 headed coin is 1/2 // 3/4
0.5 / 0.75 = 0.666666
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A social psychologist interested in cultural differences compared women of two ethnic groups on a Role Approval Index on which h
Levart [38]

Answer:

a. 5.26

Step-by-step explanation:

As, the standard deviation of the distribution of the difference between mean is 0.76 so the t score will be simply calculated by dividing the difference of means by standard deviation of the distribution of the difference between mean as hypothesized difference is zero.

t score=Xbar A- Xbar B/Sd of difference of means

t score=55-51/0.76

t score=4/0.76=5.26

3 0
3 years ago
The scale drawing at right shows the first slope of a house, the actual dimensions of the garage are 20 feet by 25 feet. All ang
ad-work [718]

Answer:

  • See below

Step-by-step explanation:

A)

<u>According to dimensions of the garage, the scale is:</u>

  • 1 in : 20 ft, as the width of the garage is 20 ft and on paper is 1 in

B)

Living room

<u>Dimensions on paper: </u>

  • 2 in x 1 1/4 in

C)

<u>Actual dimensions: </u>

  • 2*20 ft = 40 ft and
  • 1 1/4 * 20 ft = 25 ft

D)

<u>The area of the living room:</u>

  • A = lw = 25*40 = 1000 ft²

<u>Cost of carpet:</u>

  • 1000*$1.25 = $1250
4 0
3 years ago
Read 2 more answers
8. Compare the numbers in the following sequence and try to determine what the next number
Maksim231197 [3]
Answer: 90
Explanation: The pattern is add 3 then the next set is double. [9-6=3 then 18-9=9(or doubled)] and the pattern continues and because 45-42=3 the next number set would be 45 doubles which equals 90.
8 0
3 years ago
Please help 10 points
Margarita [4]

Answer:

The value of x is -2 and 2.

Step-by-step explanation:

When solve an expression, you have to make the expression equals to 0 by moving all the terms to one side :

x² - 3x - 1 = -3x + 3

x² - 3x - 1 + 3x - 3 = 0

x² - 4 = 0

Next, you have to factorize and solve it :

x² - 4 = 0

x² + 2x - 2x - 4 = 0

x(x + 2) - 2(x + 2) = 0

(x + 2)(x - 2) = 0

x + 2 = 0

x = -2

x - 2 = 0

x = 2

6 0
3 years ago
a rectangle’s length is 5 inches more than twice its width. its area is 50 square inches. which equation can be used to find its
Karo-lina-s [1.5K]

The equation used is 50 = (2w + 5) × w which can be used to find its width, w.

According to the question we are Given,

Length of rectangle = 5 inches more than its width

Area of rectangle = 50sq. inches

Let width of rectangle = w

So, According to the question,

length = 2w + 5

Area of rectangle = Length × Breadth

50 = (2w + 5) × w

So, our required equation is 50 = (2w + 5) × w

<h3>How can we describe the area of rectangle as?</h3>

The quantity of space occupied by a flat surface with a specific form is referred to as the area. It is calculated as a "number of" square units (square centimeters, square inches, square feet, etc.) The quantity of unit squares that may fit within a rectangle called its area. The flat surfaces of laptop monitors, blackboards, painting canvases, etc. are a few instances of rectangular forms.

To learn more about area of rectangle from given link

brainly.com/question/3141014

#SPJ4

4 0
2 years ago
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