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kirill [66]
3 years ago
15

A pouch contains 6 red marbles and 2 blue marbles. A second pouch contains 3 red marbles and 7 blue marbles. A marble will be dr

awn at random from the first pouch and placed in the second pouch without its color being noted. Then a marble will be drawn from the second pouch. If the second marble is​ red, what is the probability that the first marble drawn is​ blue?
Mathematics
1 answer:
aksik [14]3 years ago
4 0

Answer:

2/8

Step-by-step explanation:

because there are 2 blue marbles

add those up with the red marbles(6) and you get 8 marbles. But the chance for picking up a blue marble would be 2/8

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If she completely guesses on all of the questions, what is the probability that she gets two of the four questions correct?
masha68 [24]

Answer:

D) 0.211

Step-by-step explanation:

The probability of getting a correct answer is 1/4, so the probability of an incorrect answer is 3/4.

The probability of 2 correct and 2 incorrect is (1/4)(1/4)(3/4)(3/4) = 9/256.

There are C(4,2) = 4·3/(2·1) = 6 ways to have some combination of 2 correct and 2 incorrect out of 4 questions. So, the probability of that result is ...

... 6 · 9/256 = 27/128 =0.2109375 ≈ 0.211

6 0
4 years ago
8 less than 5 times a number
Hoochie [10]

Answer:109

Step-by-step explanation:

4 0
3 years ago
Two times a number r plus 6 is greater than - 24
Anit [1.1K]

-24 ∠ 2r + 6

-30 ∠ 2r

-15∠r


didnt completely understand the question but i hope this helps

3 0
3 years ago
2x + 3y + x + 7 identidy the terms, like terms, coefficients, and constants in each expression
charle [14.2K]

Answer:

terms, 2x, 3y , x and 7,

like terms, 2x, 3y, x and 7

Coefficient. 2 is the coefficient of 2x and 3 is the coefficient of 2y 1 is the coefficient of x

Constant. 7

Step-by-step explanation:

Given:

2x+3y+x+7

Terms are the number of parts in the  expression.

there are four terms 2x, 3y , x and 7,

Like terms are the part of the polynomials. 2x, 3y and x are like terms because  they both have an x attached. 7 is like terms because they have nothing attached.

The number that are  attached to variable is called Coefficient.

So In the term 2x the  number 2 is a coefficient because it is  attached to x similarly 3y the number 3 is a coefficient because it is  attached to y

and in the term x the number 1 is a coefficient.

Constant are the numbers that are not attached to any variable and it is not change. Such as 7 is the constant term.

7 0
3 years ago
Miller Park sits on one square city block 300ft on each side. The city wants to get an estimate of how much it would cost to put
harkovskaia [24]
300*square root of 2=424.264
424.264*25=10606.6.
6 0
4 years ago
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