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murzikaleks [220]
2 years ago
9

If a woman takes an early pregnancy test, she will either test positive, meaning that the test says she is pregnant, or test neg

ative, meaning that the test says she is not pregnant. Suppose that if a woman really is pregnant, there is a 98% chance that she will test positive. Also, suppose that if a woman really is not pregnant, there is a 99% chance that she will test negative. Assume that 1000 women are to be pregnancy tested and that exactly 100 of them are pregnant. If a randomly chosen woman from this group tests positive for pregnancy, then what is the probability that she really is pregnant?
Mathematics
1 answer:
k0ka [10]2 years ago
3 0

Answer:

0.0098

Step-by-step explanation:

Probability of being pregnant:100/1000

=1/10.

98% chance:=98/100 ×1/10

=98/1000

Therefore the probability that she really is pregnant is: 0.098

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A rectangle is 3 times as long as it is wide, and its perimeter is 80 centimeters. Find its dimensions
Free_Kalibri [48]

Say the width is W and the length is L

L=3W (and of course W=W)

Now you use the perimeter formula P=2L+2W

80=2(3W) + 2W)

80=6W+2W

80=8W Divide both sides by 8

W=10

Now that you know the width, substitute it back into L=3W to find the length

L=3(10)

L=30

The dimensions are length: 30 cm and width: 10 cm

8 0
3 years ago
Over which interval on the x-axis is there a negative
trapecia [35]
4 I’m not that sure though
5 0
3 years ago
A positive number is<br> A negative number is
marysya [2.9K]

Answer:

A positive number is the opposite of a negative number witch is negative

ex: 1,2,3,4,5,6,7,8,9

A negative number is the opposite of a positive number

ex: -1,-2,-3,-4,-5,-6,-7,-8,-9

6 0
3 years ago
If Raj randomly chooses a point in the square below, what is the probability that point is not in the circle? Assume that pi = 3
hodyreva [135]

Answer:

49.7%

Step-by-step explanation:

A cdircle is located within a square.

<u>Area of the circle</u>

Area = \pir^{2}, where r = 4 units.

Area Circle = 50.3 units^2

<u>Area of the square</u>

Area = l*w or l^2 for a square, since l = w

Area = (10 units)^2

Area = 100 units^2

<u>Area in the square but outside the circle</u>

This is the difference [Square minus Circle Areas]

Square minus Circle Areas = 100 - 50.3  or <u>49.7 units^2</u>

<u>Probability</u>

The probability of picking a point in the square that is not in the circle is the ration of the two areas:  <u>[Outside Circle/Square]x100%</u>

<u></u>

<u>(</u>49.7 units^2)/(100 units^2)x100% = 49.7%

<u></u>

6 0
1 year ago
Which is greater five ones and eight tenths or fifty eight tenths
sergiy2304 [10]
They are equal. 0.1x58=5.8, 5+0.8=5.8
8 0
2 years ago
Read 2 more answers
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