1answer.
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
miss Akunina [59]
3 years ago
12

Does anyone know how to answer this? The Probability that you draw a mechanical pencil from a group of 25 mechanical and wooden

pencils is 3/5. How many are mechanical pencils?
Mathematics
1 answer:
inn [45]3 years ago
3 0

Answer:

There are 15 mechanical pencils

Step-by-step explanation:

Recall that the probability of drawn a mechanical pencil from a larger group is given by the quotient of the number of mechanical pencils divided the total number of pencils in the sample.

so that means:

P=\frac{x}{25} \\

being x the number of mechanical pencils and 25 the total of all pencils in the sample. Since they give as P as 3/5, we can solve for the number of mechanical pencils (x) using the equation:

P=\frac{x}{25} \\\\\frac{3}{5} =\frac{x}{25}\\x=\frac{3\,*\,25}{5} \\x=15

So there are 15 mechanical pencils in the sample.

You might be interested in
Twelve of the 40 cars pulled by the locomotive were tankers.
quester [9]
12 are tankesr
40 cars total
12/40
12/40=6/20=3/10

3/10=tankders
10/10-3/10=7/10
7/10=70/100=70%
70% wern't tankser
3 0
3 years ago
Which is the better buy? 5-pack of toaster pastries for $4.13 or 9-pack of toaster pastries for $7.56
kolbaska11 [484]

Answer: <em>The answer is </em><u><em>9-pack of toaster pastries for $7.56</em></u>

Step-by-step explanation:

<em>Basicly it would be more expensive if you bought 9 for the first option but less for the other.</em>

5 0
3 years ago
Can someone please help me with math.
Umnica [9.8K]

Answer:

9) C. 35 + 0.12x = 44.36

10) B

11) A. 32

Step-by-step explanation:

9)

44.36 is the TOTAL so the equations have to EQUAL it.

PER mile means it's a variable so it's 0.12x:

35 is a constant so there's no variable attached:

35 + 0.12x = 44.36

10)

B because you have to cancel the y values and to do that, you multiply the 1st equation by 3.

11)

0.1x + 0.25(46 - x) = 6.70

0.1x + 11.5 - 0.25x = 6.7

-0.15x = 6.7 - 11.5

-0.15x = -4.8

x = 32

5 0
3 years ago
three-fifths of the members of the Spanish club are girls there are a total of 30 girls in the Spanish club which statements can
Neporo4naja [7]

Answer:

\frac{3}{5}x=30 or \frac{3}{5}(\frac{5}{3})x=30(\frac{5}{3}) or x = 50

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Each time Henry visits the art museum he pays $15 for parking and $25 for admission.
Flauer [41]

Answer:

A

Step-by-step explanation:

Since it says 'each time ' you would say 15x and 25x. Since that isnt an answer you add them together and get 40x. That eliminates B and C. Next you would do the other side of the equation. He only pays the membership one time but pays for parking every time he goes so it would be 110 and 10x

8 0
3 years ago
Other questions:
  • Use the area to find the length of jk
    12·1 answer
  • How shall i find the square root of 169 without using calculator?? please describe briefly..
    12·1 answer
  • Graph the inequality. y &lt; 3x - 5
    10·2 answers
  • The data below represents the number of customers at each Slurpee Sam's Spaghetti Shop. 24, 25, 29, 30, 31, 31, 32, 34, 34. Whic
    9·1 answer
  • a student correctly answered 80% of the 2o questions on the test How many questions did the student answer correctly
    8·2 answers
  • I need help ASAP please
    5·2 answers
  • Which of the following is equivalent to (5x^2)(4x^3)
    8·1 answer
  • Jada's pet turtle walked 12 feet, and then that length again.
    15·1 answer
  • If f(x)=3^ x-4 what is f(- 1) ?
    5·2 answers
  • Help I’m timed!
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!