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Lemur [1.5K]
3 years ago
13

Among a student group 49% use Google Chrome, 20% Internet Explorer, 10% Firefox, 5% Mozilla, and the rest use Safari. What is th

e probability that you need to pick 7 students to find 2 students using Google Chrome
Mathematics
1 answer:
Elina [12.6K]3 years ago
8 0

Answer:

17.39%

Step-by-step explanation:

We can summary the question:

  • Probability of students using Google chrome= 0.49
  • Probability of students using other browsers = 0.51

So the probability that you need to pick 7 students to find 2 students using Google Chrome is:

P(G) = C^{7} _{2} * (0.49^{2})(0.51^{7}) = 21*0.2401*0.03 = 0.1739 = 17.39%

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Which number is rational
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36/16

Step-by-step explanation:

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3 years ago
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A worm moves forward 3/8 inch every 5 minutes for 1 hour 25 minutes. How fast does the worm move in this time?
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Multiply <span>3/8 inch by 75 and divide by 5</span>
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Find the quotient and express it in the simplest form
pychu [463]
2i(4+5i)(4-5i) =82i
4+i nothing more can be done it is at simplest form 

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5 0
3 years ago
Height
dem82 [27]

Answer:

<h3>1 secs</h3>

Step-by-step explanation:

Given the height of the discus can be modeled by the equation y=−16x ^2 +32x+4, where y represents the  height in feet of the discus in seconds, the velocity of the discus at its maximum height is zero.

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dy/dx = -32x + 32

0 = -32x + 32

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8 0
3 years ago
Eli and Angela are saving money to buy their grandparents an anniversary gift. Eli has saved 8 more than 1/3 of Angela's savings
Trava [24]

Answer:

$10

Step-by-step explanation:

Let a = the amount Angela has saved.

Let e = the amount Eli has saved.

"Eli has saved $8 more than 1/3 of Angela's savings."

e = a/3 + 8

"If they each save $10 more." then

Eli will have: e + 10

Angela will have a + 10

"Eli will have saved $4 more than Angela's savings."

e + 10 = a + 10 + 4

This equation simplifies to: e = a + 4

We have a system of two equations in two variables.

e = a/3 + 8

e = a + 4

Since both equations are solved for e, we just equate the right sides.

a/3 + 8 = a + 4

Subtract a/3 from both sides. Subtract 4 from both sides.

a/3 - a/3 + 8 - 4 = a - a/3 + 4 - 4

4 = (2/3)a

Multiply both sides by 3/2

(3/2)4 = (3/2)(2/3)a

6 = a

a = 6

Angela has $6.

e = a + 4 = 6 + 4 = 10

Eli has $10.

4 0
3 years ago
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