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Maksim231197 [3]
3 years ago
12

Twenty percent of all undergraduates at a university are chemistry majors. In a random sample of six ​students, find the probabi

lity that exactly four are chemistry majors.
Mathematics
1 answer:
tamaranim1 [39]3 years ago
6 0
The probability that 4 are chem majors would be 5%
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Sara selects two of the seven colors of the rainbow, one after another, with replacement. What is the probability that the first
Triss [41]

Well, there are actually millions of colors in the rainbow, (every color that the human eye can see), but I do understand the question you're asking:

 

-- When Sara is ready to make her first selection, there are seven things with different colors in the pot, and one of them is red.

The probability that she picks the red one is ( 1 / 7 ).

The question says "with replacement". That means that after she selects it and looks at it, she puts it back in the pot. So . . .

-- When she's ready to make her second selection, the same seven things with different colors are still in the pot.  One of them is orange.

The probability that she picks the orange one is ( 1 / 7 ).

-- The probability of BOTH selections being successful (the color she wants) is

(1/7) x (1/7) .

That's <em>(1/49)</em>, which is about  <em>2.04 percent</em> .

3 0
3 years ago
The measure angle A is (2x+3), B (4x+2), C (2x-1). What are the measures of the angles?
Rudik [331]

Answer:

<A= 47, <B= 90, <C= 43

Step-by-step explanation:

2x +3 + 4x + 2 + 2x-1 = 180

8x + 4= 180

8x = 176

x =22

2x+3= 44+3= 47

4x+2 = 88+2 = 90

2x-1= 44-1 = 43

8 0
3 years ago
What is 12ft divided by 25
Basile [38]

Answer:0.48ft

Step-by-step explanation:12/25

7 0
3 years ago
Help me with work = brainlist
notka56 [123]

Answer:

13 is 90

14 is 43

15 is 146

7 0
3 years ago
What are the steps to solve a quadratic equation? (If you do not give a thorough explanation you will be reported.) Have a good
Rasek [7]

Answer:

<h2>See below</h2>

Step-by-step explanation:

first thing you didn't give any quadratic equation and also didn't allude which method you indeed however I'll give you two methods

  • factoring
  • quadratic formula

to get elaborately factoring method

see this question which is answered by me

  • brainly.com/question/22505331

quadratic formula:

  • \displaystyle \: x =  \frac{ - b \pm \:  \sqrt{ {b}^{2} - 4ac } }{ 2a}

by using this formula we can solve quadratic very early

we just need to substitute the value of a,b and c and simply to get x

  • brainly.com/question/9701183?referrer=searchResults
7 0
3 years ago
Read 2 more answers
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