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
jasenka [17]
3 years ago
11

There are 10 red and 20 yellow balls. Drawing 3 balls without replacement, what is the chance the first is red and the next two

are yellow?
Mathematics
1 answer:
Xelga [282]3 years ago
6 0

10 + 20 = 30 total balls.

Picking red = 10/30 = 1/3

After picking one ball there are 29 balls left.

Picking a yellow next is 20/29

Then there are 28 balls left and 19 yellow left, so picking another yellow would be 19/28

The probability of picking red first then two yellow = 1/3 x 20/29 x 19/28 = 95/609

You might be interested in
What is the answer to this?
Zina [86]

Answer:

37.14 units

Step-by-step explanation:

the whole circumference of a circle is 2×pi×r

a whole circle rotates 360 degrees (one time all around).

so, the length of the arc for a full trip (360 degrees) around a circle is the stated 2×pi×r.

now, if we go only for a part of that full trip angle, the arc is only the corresponding part of the circumference.

in our example here, r (radius) = QR = 19 units

and we only go along the circle for 112 degrees out of the full 360 (112 parts of the whole 360).

so the arc QS = 2×pi×19 × 112/360 = 37.14 units

5 0
3 years ago
Find the perimeter and area of the following using pie=3.14
dimaraw [331]

To solve this question we will use the following diagram:

From the diagram, we get that the diameter of the semicircle is 8cm.

The perimeter of the figure is:

P=14\operatorname{cm}+4\operatorname{cm}+6\operatorname{cm}+\pi\cdot8\operatorname{cm}\text{.}

Substituting π=3.14 and simplifying we get:

\begin{gathered} P=14\operatorname{cm}+4\operatorname{cm}+6\operatorname{cm}+25.12\operatorname{cm}, \\ P=49.12\operatorname{cm}\text{.} \end{gathered}

Now, the area of the given figure is the area of the rectangle plus the area of the semicircle:

A=14\operatorname{cm}\times4\operatorname{cm}+\frac{\pi\cdot(4\operatorname{cm})^2}{2}\text{.}

Substituting π=3.14 and simplifying we get:

\begin{gathered} A=56cm^2+25.12cm^2, \\ A=81.12cm^2. \end{gathered}

Answer:

\begin{gathered} \text{Perimeter}=\text{ 49.12cm,} \\ \text{Area}=\text{ 81.12 cm}^2. \end{gathered}

8 0
1 year ago
Quadrilateral ABCD is a rectangle. The measure of angle CBE is equal to 32°, find the
GrogVix [38]

Answer:

116 degrees

Step-by-step explanation:

well from the picture we know this is a 45 45 90 style triangle therefore in if CBE is equal to 32 then ECB should also be equal to 32 leaving you with a total number of 64 degrees within the triangle. and in every triangle you must add up the degrees to 180 so if we subtract 64 from 180 we get 116 degrees for BEC

6 0
3 years ago
Read 2 more answers
What is the name of an investment in which deposits are made in fixed dollar amounts at regular intervals?
andrew11 [14]

Answer: periodic investment APEX

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Is 0.1km greater than 10mm?
mixer [17]
0.1km=0.1\cdot1000m=100m=100\cdot1000mm=100\ 000mm > 10mm
5 0
3 years ago
Read 2 more answers
Other questions:
  • What is the volume of a right triangular pyramid whose base is 3 meters on each side and whose altitude is 4 meters? A. 15.6 m3
    12·2 answers
  • For a business meeting, Jenna is making copies of her presentation. The more people
    9·1 answer
  • Please I need help badly and quickly, pls do not answer if you just want the points. I need an accurate answer for this. Cheers
    12·1 answer
  • Find the number that makes the ratio equivalent to 1:7. 8:?
    5·1 answer
  • What is the answer ​
    15·2 answers
  • What is 2+5, please hurry i can't figure it out and my test is about to end
    15·2 answers
  • 3. The number of visitors to a website in the first week is 48. The number of visitors each week is double the number of visitor
    8·1 answer
  • SOMEONE PLEASE HELP I DONT KNOW HOW TO DO THIS
    12·1 answer
  • Select the correct answer.
    14·2 answers
  • Whoever knows the answer tell me please thank you :)
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!