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ki77a [65]
3 years ago
15

Elaine is taking a test that has multiple choice questions,each with 4 answer choices. She comes to a question for which she doe

s not know the awnser. If she can rule out three of the choices as wrong, by how much does she improve her probability of guessing correct awnser?
Mathematics
1 answer:
jekas [21]3 years ago
5 0

Assuming There is ONLY ONE CORRECT ANSWER,

The probability of her guessing the answer without ruling out the choices is 1/5.

if 3 choices are ruled out, then 1 out of the remaining two is right, which gives the probability 1/2

now, 1/5 = 20% , while 1/2 = 50%.

Therefore her probability of getting the correct answer improves by 30% [ not much in a REAL test though :P ]

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What is the probability that a point chosen at random in the given figure will be inside the larger square and outside the small
liraira [26]

Answer:

  • 51/100

Step-by-step explanation:

<em>The probability that a point chosen at random in the given figure will be inside the larger square and outside the smaller square</em> is equal to the ratio of the area of interest to the total area:

<em>P(inside larger square and outside smaller square)</em> = area of interest / total area

<em>P(inside larger square and outside smaller square)</em> = area inside the larger square and outside the smaller square / area of the larger square

<u>Calculations:</u>

<u />

1. <u>Area inside the larger square</u>: side² = (10 cm)² = 100 cm²

2. <u>Area inside the smaller square </u>= side² = (7cm)² = 49 cm²

3. <u>Area inside the larger square and outside the smaller square</u>

  • 100 cm² - 49 cm² = 51 cm²

4.<u> P (inside larger square and outside smaller squere)</u>

  • 51 cm² / 100 cm² = 51/100
5 0
3 years ago
6)<br> Solve.<br> x + 5 = 10<br> A)<br> x = 2<br> B)<br> x = 3<br> 09<br> x = 4<br> D)<br> X = 5
LenaWriter [7]
D is the correct answer
x+5=10: subtract 5 from both sides the 5 will cancel out leaving x=5
x+5=10
-5 -5
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4 0
3 years ago
Complete this sentence: in a triangle, the angle with the smallest measure is always opposite the
Marta_Voda [28]

Answer:

Complete this sentence: in a triangle, the angle with the smallest measure is always opposite the <u><em>shortest side</em></u>.

8 0
3 years ago
Read 2 more answers
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Taking out the greatest common factor

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so the factors are

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lisov135 [29]
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7 0
3 years ago
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