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horrorfan [7]
3 years ago
6

For an online educational clip, 80 percent of the first 240 viewers voted “like” for the clip. If all of the next 80 viewers vot

ed “like” for the clip, what percent of all these viewers voted “like”?
Mathematics
1 answer:
saveliy_v [14]3 years ago
6 0

Answer: There is 85% of all these viewers voted "like".

Step-by-step explanation:

Since we have given that

Number of first viewers  = 240

Percentage of first viewers who voted "like" for the clip = 80%

Number of people who voted "like" for the clip =

\dfrac{80}{100}\times 240\\\\=0.8\times 240\\\\=192

Number of next viewers = 80

total number of viewers = 240+80 = 320

Number of viewers who voted "like" for the clip = 80

Total number of viewers who voted "like" for the clip = 192+80=272

So, overall percentage of viewers voted "like" is given by

\dfrac{272}{320}\times 100\\\\=85\%

Hence, there is 85% of all these viewers voted "like".

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7 0
3 years ago
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1. A gambler makes 100 column bets at roulette. The chance of winning on any one play is 12/38. The gambler can either win $ 5 o
lapo4ka [179]

Answer:

a) Expected amount of the gambler's win = $0.209

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Step-by-step explanation:

The probability of winning, p = 12/38 =6/19

Probability of losing, q = 1 -p = 1-6/19

q = 13/19

Win amount = $5

Loss amount = $2

a) Expected total amount of win = ((6/19)*5) - ((13/19)*2)

Expected total amount of win = 1.579 - 1.369

Expected amount of win, E(X) = $0.209

b) Standard Deviation for the total amount of the gambler's win

SD = \sqrt{E(X^{2}) - (E(X))^{2} }

E(X²) = (6/19)*5²  -  (13/19)*2²

E(X²) = 5.158

SD = \sqrt{5.158 - 0.209^2}

SD = 2.26

c)  probability that, in total, the gambler wins at least $1.

P(X >1)

z = \frac{X - \mu}{\sigma}

μ = E(x) = 0.209

z = (1-0.209)/2.26

z = 0.35

P( X >1) = P(z >0.35)

P(z >0.35) = 1 - P(z <0.35)

P(z >0.35) = 1 - 0.63683

P(z >0.35) = 0.36317

5 0
3 years ago
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stealth61 [152]
You want to figure out what the variables equal to, all of these are parallelograms meaning opposite sides and angles are equal to each other.

In question 1 start with 3x+10=43, this means that 3x is 10 less than 43 which is 33, 33 divided by 3 is 11 meaning x=11.

Same thing can be done with the sides 124=4(4y-1), start by getting rid of the parentheses with multiplication to get 124=16y-4, this means that 16y is 4 more than 124, so how many times does 16 go into 128? 8 times, so x=11 and y=8

Question 2 can be solved because opposite angles are the same in a parallelogram, so u=66 degrees

You can find the sum of the interial angles with the formula 180(n-2) where n is the number of sides the shape has, a 4 sided shape has a sum of 360 degrees, so if we already have 2 angles that add up to a total of 132 degrees and there are only 2 angles left and both of those 2 angles have to be the same value then it’s as simple as dividing the remainder in half, 360-132=228 so the other 2 angles would each be 114, 114 divided into 3 parts is 38 so u=66 and v=38

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6 0
2 years ago
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7nadin3 [17]

Answer:

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Step-by-step explanation:

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8 0
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Answer:

A

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