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White raven [17]
3 years ago
9

One jar holds 20 green marbles and 4 white marbles. A second jar holds 60 black marbles and 20 white marbles. What is the probab

ility that a white marble will be drawn from both jars?
Mathematics
1 answer:
Black_prince [1.1K]3 years ago
8 0

Answer:

Step-by-step explanation:

Let RBY = “Draw a Red, then Blue, then Yellow”

● So all disjoint events we want to consider are: RBY,  

RYB, YRB, YBR, BYR, BRY – there are 6 of them.

● P(RBY) = P(R)*P(B)*P(Y) = (30/55)*(5/55)*(12/55)  

= .0108

● But we have 6 disjoint cases. Because each one is  

calculated as a product of the three, and each  

disjoint case has the same probability (each order is  

equally likely), our answer is 6*.0108 = .0649

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Jenna wants to convert a decimal number to its octal form. Which option will she use to calculate the octal number? In the octal
Dovator [93]

Jenna wants to convert a decimal number to its octal form.

The octal numeral system is the base-8 number system, and it uses the digits 0 to 7.

To convert the given decimal number into the octal form, we have to divide the given decimal number by 8 to get its octal form as the base value of the octal number is 8.

Therefore, the complete statement is:

"In the octal number system, you need to divide a number by the base value 8 ".

3 0
4 years ago
Which equation can be used to find B in the triangle below?
WINSTONCH [101]

9514 1404 393

Answer:

  (b)  tan B = 8/6

Step-by-step explanation:

The mnemonic SOH CAH TOA is intended to remind you of the relevant relationships:

  Cos = Adjacent/Hypotenuse

  Tan = Opposite/Adjacent

Then angle B is involved in tangent and cosine relationships this way:

  tan B = 8/6 . . . . . . matches 2nd choice

  cos B = 6/10 . . . . . matches no choices

_____

<em>Additional comment</em>

Both of the offered cosine choices give a cosine value that is greater than 1. The cosine of a real angle is never greater than 1, so those can be rejected immediately.

8 0
3 years ago
Students in 7th and 8th grade were asked the types of movies they prefer. The results of the survey are shown in the two-way tab
Andreyy89

A table is a arrangement of the data or the information. For the given table statement second, third and fifth are the correct statements.

Given information-

A four by four table in given for the survey of the 7th and 8th group students for the movie preference.

The first column has no label with entries drama, action, comedy, total.

The second column is labeled 7th with entries 11%, 25%, 14%, 50%.

The third column is labeled 8th with entries 15%, 19%, 16%, 50%.

The fourth column is labeled total with entries 26%, 44%, 30%, 100%.

<h3>Table </h3>

A table is a arrangement of the data or the information

Now look at the statement.

  • 1) More 7th graders were surveyed than 8th graders- As both 7th grade and the 8th grade student surveyed are 50 percent. Thus the statement 1 is incorrect.
  • 2) The marginal relative frequency for action movies is 44%-Total 7th grade students like the action movies are 25 percent. Total 8th grade students like the action movies are 19 percent. The sum of both is 44 percent. Thus this is correct statement.
  • 3) The joint relative frequency for 8th graders who like comedy movies is 16%- From the table it can be said that the frequency of the 8th grade students likes the comedy movie is 16 percent. Thus this is a correct statement.
  • 4) Most students prefer drama movies- The highest number of the movie preferred by the students is action movie. Thus this is an incorrect statement.
  • 5) Half of the 7th graders prefer action movies- The 50 percent of the 7th grade is surveyed in which 25 percent like the action movie.25 is the half of the 50. Thus it is a correct statement.

Hence for the given table statement second, third and fifth are the correct statements.

Learn more about the data representation in table here;

brainly.com/question/7727331

4 0
2 years ago
it's really easy Pleaseplease answer this I'm desperate please ill give brainliest to the first right answer
Studentka2010 [4]

Answer:

It should be 12 i dont know ,,I learned it in class but my teacher told me that there are different types of this math so I don’t know if this is the one I learned

Step-by-step explanation:

5 0
3 years ago
each of the letters of the word ALABAMA is written on a piece of paper and then put into a bag. A piece of paper is drawn at ran
Yanka [14]

Answer:

P(A) = 0.57 (to the nearest hundredth)

Step-by-step explanation:

There are 7 letters in total

4 of them are the letter A

⇒ P(A) = 4/7

           = 0.5714285714...

           = 0.57 (to the nearest hundredth)

5 0
3 years ago
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