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irakobra [83]
3 years ago
12

A quiz consists of 20 multiple-choice questions, each with 5 possible answers. for someone who makes random guesses for all of t

he answers, find the probability of passing if the minimum passing grade is 60 %.
Mathematics
1 answer:
blondinia [14]3 years ago
7 0
N = 20, the number of questions
p = 1/5 = 0.2, the probability of making a correct guess
q = 1 - p = 0.8, the probability of making an incorrect guess.
Expected success  = 60% or 6 of 10.

From the binomial distribution,
P(6 of 10) = ₁₀C₆ p⁶q⁴
                 = 210*0.2⁶*0.8⁴ = 0.0055

Answer: 0.0055

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15 of 15 Find the size of the final unknown interior angle in a polygon whose other interior angles are: 162°, 115°, 125°, 148°
alexandr1967 [171]

Answer: 147 Degrees

Step-by-step explanation

The size of the final unknown interior angle in a polygon is 147 degrees.

Given that,

The other interior angles are 162°, 115°, 120°, 148° and 85°.

We assume that there is an equation (2n - 4) 90.

Here n be 7.

Based on the above information, the calculation is as follows:

= (2n - 4) 90

= ((2) (7) - 4) 90

= 10 (90)

= 900

Now the size of the unknown interior angle is  

= 900-(162+125+148+105+98+115)

= 900 - 753

= 147°

Therefore we can conclude that the size of the final unknown interior angle in a polygon is 147 degrees.

6 0
2 years ago
Marley loves to draw and color. She bought 6 boxes of crayons. There are 8 crayons in each box. What is the total number of cray
Tanzania [10]

Answer:

48 crayons

Step-by-step explanation:

There are 6 boxes total, each with 8 crayons in them. Notice that if you would count all the crayons, you would add 8 to the total number of crayons each time you counted a box. There are 6 boxes, so that would be equivalent to adding 8 a total of six times. You would use multiplication: 6 x 8 which is 48.

7 0
2 years ago
Read 2 more answers
a person stands on top of a 200 ft building and spots a person on the ground below. the angle of depression from where the perso
PolarNik [594]

Answer:

246.979 ft

Step-by-step explanation:

When we draw our picture, we should be able to see that the angle of depression from the point of view is equal to the angle of elevation from the ground. We also know the height, and we are trying to find horizontal <em>x</em>. We must use tan∅ to solve:

tan39° = 200/x

xtan39° = 200

x = 200/tan39°

x = 246.979

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3 years ago
The restaurant bill you and your friend received
babunello [35]

Answer:

$1

Step-by-step explanation:

tyyyyyyyyyyyyyyyyyyyyyy

3 0
2 years ago
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I’m slow , can i get help on this asap please ?
makkiz [27]
140°
Pentagons add up to 540° so if you add all the degrees you get 400° and if subtracted from 540° you get 140°
5 0
3 years ago
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