answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
dolphi86 [110]
2 years ago
14

A record collection consists of eight rock albums, twelve blues albums, and four classical albums. If two records are chosen ran

dom, find the probability that they are both blues? ...?
Mathematics
1 answer:
DerKrebs [107]2 years ago
3 0
Total albums:
8 + 12 + 4 = 24

Probability of both blue = Probability of first blue x Probability of second blue
P(First blue) = 12/20
P(Second blue) = 11/19

P(Both blue) = 12/20 x 11/19
= 33/95
You might be interested in
3. The area of a rectangular deck, in square meters, is given by the polynomial 40p2 + 24p.
lorasvet [3.4K]

Answer:

Length = 5p + 3

Perimeter = 26p + 6

Step-by-step explanation:

Given

Area = 40p² + 24p

Width = 8p

Solving for the length of deck

Given that the deck is rectangular in shape.

The area will be calculated as thus;

Area = Length * Width

Substitute 40p² + 24p and 8p for Area and Width respectively

The formula becomes

40p² + 24p = Length * 8p

Factorize both sides

p(40p + 24) = Length * 8 * p

Divide both sides by P

40p + 24 = Length * 8

Factorize both sides, again

8(5p + 3) = Length * 8

Multiply both sides by ⅛

⅛ * 8(5p + 3) = Length * 8 * ⅛

5p + 3 = Length

Length = 5p + 3

Solving for the perimeter of the deck

The perimeter of the deck is calculated as thus

Perimeter = 2(Length + Width)

Substitute 5p + 3 and 8p for Length and Width, respectively.

Perimeter = 2(5p + 3 + 8p)

Perimeter = 2(5p + 8p + 3)

Perimeter = 2(13p + 3)

Open bracket

Perimeter = 2 * 13p + 2 * 3

Perimeter = 26p + 6

4 0
2 years ago
An artist wants to make alabaster pyramids using a block of alabaster with a volume of 576 cubic inches. She plans to make each
tensa zangetsu [6.8K]
Given:
volume of the block = 576 cubic inches
Square pyramid = base area : 3 square inches ; height = 4 inches

Volume of square pyramid = a² * h/3
V = 3 square inches * 4inches/3
V = 4 cubic inches

volume of block / volume of square pyramid
576 cubic inches / 4 cubic inches = 144 

She can make 144 square pyramids.
3 0
2 years ago
Read 2 more answers
For a set population, does a parameter ever change? sometimes always unknown never if there are three different samples of the s
Levart [38]

For a set population, does a parameter ever change?

Answer: For a set population, a parameter never change.

Because while computing the parameter each and every unit of the population is studied. Therefore, we can not expect a parameter to vary.

If there are three different samples of the same size from a set population, is it possible to get three different values for the same statistic?

Answer: Data from samples may vary from sample to sample, and so corresponding sample statistic may vary from sample to sample.

Because while calculating the sample statistic, we consider only the part of population. Every time we draw a sample from population, there is every possibility of getting different sample. Therefore, data from samples may vary from sample to sample and corresponding sample statistic may vary from sample to sample.

5 0
2 years ago
Simon has a quarter, dime, nickel, and penny in his pocket. He wants to buy a snack at the canteen that costs 40¢. If he pulls o
ludmilkaskok [199]

Answer:

It would be a 3/4 chance that he will pull the right 4 coins.

Step-by-step explanation:

8 0
2 years ago
Katie wants to create a rectangular frame for a picture. She has 60 inches of material. If she wants the length to be 3 more tha
Fofino [41]

Answer:

Largest possible length is <em>21 inches</em>.

Step-by-step explanation:

Given:

Total material available = 60 inches

Length to be 3 more than twice of width.

To find:

Largest possible length = ?

Solution:

As it is rectangular shaped frame.

Let length = l inches and

Width = w inches

As per given condition:

l = 2w+3 ..... (1)

Total frame available = 60 inches.

i.e. it will be the perimeter of the rectangle.

Formula for perimeter of rectangle is given as:

P = 2 \times (Width + Length)

Putting the given values and conditions as per equation (1):

60 = 2 \times (w+ l)\\\Rightarrow 60 = 2 \times (w+ 2w+3)\\\Rightarrow 60 = 2 \times (3w+3)\\\Rightarrow 30 = 3w+3\\\Rightarrow 3w = 27\\\Rightarrow w = 9 \ inch

Putting in equation (1):

l = 2\times 9+3\\\Rightarrow l = 21\ inch

So, the answer is:

Largest possible length is <em>21 inches</em>.

6 0
2 years ago
Other questions:
  • 9 = 90, 8 = 72, 7 = 56, 6 = 42, 3 = ?
    13·2 answers
  • Alfred wants to waste less than 175 gallons of water this week. Every day that he waters the lawn, he wastes 59 gallons of water
    14·2 answers
  • An exponential function f(x) is reflected across the y-axis to create function g(x). Which is a true statement regarding f(x) an
    10·2 answers
  • Consider the equation pV=kTN , where k is a constant. Select all of the correct answers that describe the variation between vari
    5·1 answer
  • 6x^2-2.4=0<br><br> show all answers<br><br> I need the answer desperatly
    11·1 answer
  • The mass of a colony of bacteria, in grams, is modeled by the function P given by P(t)=2+5tan^−1.(t/2), where t is measured in d
    11·2 answers
  • Jean's bedroom is 11 feet by 14 feet. She has chosen a carpet which costs $33.30 per square yard. This includes installation.
    9·1 answer
  • It has been suggested that night shift-workers show more variability in their output levels than day workers. Below, you are giv
    5·1 answer
  • Steph makes 90\%90%90, percent of the free throws she attempts. She is going to shoot 333 free throws. Assume that the results o
    9·2 answers
  • We can use algebraic operations to rewrite expressions, including polynomial expressions. When we rewrite polynomial expressions
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!