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
Gnom [1K]
3 years ago
12

A survey is made in a neighborhood of 80 voters. 65 are democrats and 15 are republicans. of the democrats, 35 are women, while

5 of the republicans are women. if one subject from the group is randomly selected, find the probability the individual is a democrat or a republican.
Mathematics
2 answers:
balandron [24]3 years ago
8 0

<u>Answer</u>:  1

<u>Step-by-step explanation</u>:

Given: Total voters n(S)= 80

Number of democrats n(D)= 65

Number of republicans n(R)= 15

Number of voters that are democrats and republicans=n(D\cap R)=0

[Since both are different parties and thus independent means no individual can be common in both parties]

Then, the number of individuals that are  democrat or republican is given by :-

n(D\cup R)=n(D)+n(R)-n(D\cap R)\\\\\Rightarrow n(D\cup R)=65+15-0\\\\\Rightarrow n(D\cup R)=80

If one subject from the group is randomly selected, find the probability the individual is a democrat or a republican=P(D\cup R)=\frac{n(D\cup R)}{n(S)}=\frac{80}{80}=1

Aleksandr [31]3 years ago
7 0
Total voters=v=80
total no. of democrats=d=65
total no. of republicans=r=15
probability of democrats=p1=65/80=0.8125
probability of republicans=p2=15/80=0.1875
probability of a democrat or a republican=p1+p2=0.8125+0.1875=1 <span />
You might be interested in
the length of a rectangular building is 6 feet less than 3 times t he width. The perimeter is 120 feet. Find the width and the l
garri49 [273]
Call the width x.  Note that the length is 3x-6.  We know that double the width plus double the length is 120, so we write an equation:

2(x)+2(3x-6)=120
2x+6x-12=120
8x-12=120
8x=132
x=16.5
If x is 16.5, the width is 16.5, and the length is 3 \cdot 16.5 - 6 = 43.5.
5 0
3 years ago
Can some one help me
il63 [147K]

Answer:

5/6

Step-by-step explanation:

<em>Dividing fractions:</em>

<em>Step 1: Rewrite the first fraction as it is.</em>

<em>Step 2: Replace the division sign with a multiplication sign.</em>

<em>Step 3: Flip the second fraction.</em>

<em>Step 4: Multiply the fractions and reduce the product if necessary.</em>

Let's use the rule of dividing fractions on your problem.

Step 1: Rewrite the first fraction as it is.

\dfrac{5}{8}

Step 2: Replace the division sign with a multiplication sign.

\dfrac{5}{8} \times

Step 3: Flip the second fraction.

\dfrac{5}{8} \times \dfrac{4}{3}

Step 4: Multiply the fractions and reduce the product if necessary.

To multiply fractions, multiply the numerators together, and multiply the denominators together.

\dfrac{5}{8} \times \dfrac{4}{3} = \dfrac{5 \times 4}{8 \times 3} = \dfrac{20}{24}

We notice that the greatest common factor of 20 and 24 is 4, so we divide both the numerator and denominator by 4 to reduce the fraction.

= \dfrac{4 \times 5}{4 \times 6} = \dfrac{5}{6}

5 0
3 years ago
Item 2
ivanzaharov [21]

Answer:

The answer is 20m=8

7 0
3 years ago
Read 2 more answers
Three times the sum of a number and seven is 23 less than five times the number find the number wrong your answer to the nearest
mote1985 [20]

so you have your two equations 3x+7=5x-23 and solve for x which is your "number" leaving the answer to be <u>x=15</u>

4 0
3 years ago
Helppppp question 21,22
Anna35 [415]

21. B or 6

22. B or 2a/h

3 0
1 year ago
Other questions:
  • Two containers filled with water are leaking. Container A leaks at a rate of 1/4 gallon per hour. Container B leaks at a rate of
    9·1 answer
  • 3 points
    8·1 answer
  • Please explain how and give the answer!
    14·2 answers
  • 1/2 = 1/4 (×-10) how can I solve it
    10·1 answer
  • How do I do the random guess and test? which it gave me a hint to do so
    11·1 answer
  • Find the slope of BC.<br><br> B(-1, 3) C(3, 2)
    12·2 answers
  • Please someone help me on how to do grids?
    15·2 answers
  • Clare subscribes to an online music streaming service
    8·1 answer
  • 3hr 60min 3s — 1hr 15min 55s
    9·1 answer
  • What is the ratio of lines b : c if A is 77°
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!