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
Kaylis [27]
3 years ago
14

Suppose spin a spinner with eight equal sectors, numbered 1 to 8. What is the probability of spinning a 3 or an 8?

Mathematics
2 answers:
expeople1 [14]3 years ago
6 0

\frac{2}{8}  =  \frac{1}{4}
olasank [31]3 years ago
4 0

Given, in the spinner 8 equal sectors, numbered 1 to 8.

So total numbers = 8.

Let, the probability of spinning a 3 is P(Three) and spinning an 8 is P(Eight).

Now we know that, probability of an event E is

P(E) = (number of outcomes in the event)/ (total number of possible outcomes).

So here number of outcomes for spinning a 3 is 1 and we have got total outcomes = 8.

So P(Three) = \frac{1}{8}

Similarly, P(Eight) = \frac{1}{8}

Probability of spinning a 3 or an 8 = P(Three) + P(Eight)

= \frac{1}{8} + \frac{1}{8}

As the denominator is same we can add the numerator.

= \frac{(1+1)}{8}

= \frac{2}{8}

Now we have to simplify the fraction by dividing the numerator and denominator by a common factor of them.

The common factor of 2 and 8 is 2. So by dividing them we will get,

= \frac{1}{4}

We have got the required answer.

The probability of spinning a 3 or an 8 is \frac{1}{4}


You might be interested in
at the same time a 15 foot pole casts a 7.5 foot shadow a nearby tree casts an 11 foot shadow how tall is the tree​
soldier1979 [14.2K]

answer: 22

15/7.5 = x/11

cross multiply

7.5x = 165

divide by 7.5 on both sides to get the x alone

7.5x/7.5 = 165/7.5

x = 22

the tree is 22 feet

sorry if it’s wrong

4 0
3 years ago
What is the mean of the measures of the three exterior angles of a triangle if two of the interior angles have measures of 63 an
Genrish500 [490]

Answer:

  1. Mean score=120

Step-by-step explanation:

  1. Areas of a triangle add upto 180degrees (63+78+x=180) 141+x= (x=180-141) x=39
  2. Areas on a straight line add upto 180degrees

180-78=102

180-63=117

180-39=141

  1. 102+117+141=360
  2. Mean=360/3 =120

4 0
3 years ago
How to do this?
Mandarinka [93]
This equation uses two properties of logarithms:

\ln(g^x) = x \ln(g)

\ln(a) + \ln(b) = \ln(ab)

So you could take the ln from left and right hand side in the equation, and get:

(2-x)ln 3 = x ln 5

then

2 ln 3 - x ln 3 - x ln 5 = 0 =>

x(ln 3 + ln 5) = 2 ln 3

so x = 2 ln 3 / (ln3 + ln5)

Now using the 1st property you can say 2 ln 3 is ln 3² = ln9
and using the 2nd property you can say ln3 + ln5 = ln15

so x= ln9 / ln15


7 0
3 years ago
Add the following rational number7/-27 and 11/18
poizon [28]

Answer:

19/54

Step-by-step explanation:

- 7/27 + 11/18

LCM of the 27, 18 is 54

- 7/27 * (2/2) + 11/18 * (3/3)

- 14/54 + 33/54

33 - 14/54

19/54

please mark me brainlist

3 0
2 years ago
Solve for the values of x and y in the diagram
qaws [65]

Answer: y = 0.5, x = 50

Step-by-step explanation: Both triangles in the picture are isosceles, telling us that the 2 angles at the bottom are congruent. With this, we can find y by doing the following:

a triangle has 180 degrees so we subtract the given 50 which gives us 130

2(2y + 64) = 130

4y + 128 = 130

y = .5

This means that the bottom 2 angles are both 65. Since the top angle of the second triangle is supplementary to the bottom angle of the first one, the top angle of the second triangle is 115. So, we find x by:

2(45 - x/4) = 65

x = 50

This means the bottom 2 angles of the second triangle are both 32.5.

7 0
3 years ago
Read 2 more answers
Other questions:
  • Suppose a shipment of 400 components contains 68 defective and 332 non-defective computer components. From the shipment you take
    12·1 answer
  • ALGEBRA HELP PLEASE !!
    15·1 answer
  • A toy company wants to sell 1600 toy airplanes this year. so far they have sold 600. what percent of the sales goal have they re
    9·1 answer
  • Laura has a job that pays $4,625 monthly. How much is
    12·1 answer
  • For the polynomial x^3-7x^2+12x-6, 1 is a zero. Express g(x) as a product of linear factors.
    7·1 answer
  • Frank decided to keep track of his sleep using a fitness tracker. He was surprised to
    9·1 answer
  • If I save 20$ at the end of every month for 12 years, how much will I have?
    11·1 answer
  • A recipe uses 375 g of potatoes and 225 g of lentils.
    8·2 answers
  • I really need help with this is due on Friday pls help with steps!
    15·1 answer
  • 3x-4y+11 for x-2 and y-1
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!