Question

A spinner is divided into 10 equal sections numbered 1 through 10. If the arrow is spun twice, what is the probability the first number will be even and the second number will be a 7?

I dont understand how to do this problem

Answer 1

The probability of the first number being even is:
\[P _{1}=\frac{quantity\ of\ even\ numbers}{total\ quantity\ of\ numbers}\]
The probability of the second number being a 7 is:
\[P _{2}=\frac{1}{10}\]
The results of the two spins have no effect on each other, therefore they are independent events.
The probability the first number will be even and the second number will be a 7 is given by:
\[P _{1} \times P _{2}=you\ can\ calculate\]

Answer 2

thank you :) helped a lot

Answer 3

You're welcome :) Have you a result?

Answer 4

0.1 ?

Answer 5

Not really.
\[P _{1}=\frac{4}{10}\]
\[P _{2}=\frac{1}{10}\]
\[P _{1} \times P _{2}=\frac{4}{10}\times\frac{1}{10}=can\ you\ calculate?\]

Answer 6

0.04 but how did you get 4/10 ?

Answer 7

Look at my first post for how to find the value of P1.

Answer 8

but the answer is 0.04 or did i get it wrong again?

Answer 9

it will be 1/2 and 1/10

Answer 10

so 0.5 and the other one will be 0.1

Answer 11

@driftracer is correct. There are 5 even numbers.

Answer 12

yea so sorry i jumped directly to 1/2.............it would be 5/10.......which equals to 1/2.........equals to 0.5....

Answer 13

In a large bag of candy, each of the 5 colors (red, orange, yellow, blue, and green) occurs with the same probability. You reach in and select 1 candy.

Would you use the same equation to this one ?

Answer 14

\[P _{1}=\frac{5}{10}\]
\[P _{2}=\frac{1}{10}\]
The probability the first number will be even and the second number will be a 7 is:
\[P _{1} \times P _{2}=\frac{5}{10}\times\frac{1}{10}=you\ can\ calculate\]

Answer 15

Find P(Red, orange, or yellow).
sorry i didnt finish the question

Answer 16

P(red) =1.........same goes for orange and yellow

Answer 17

The probability of selecting each of the five colors = 1/5.
The probability of selecting Red, orange, or yellow is 3/5

Answer 18

so would it be (1/5) x (1/5) x (1/5) = 0.6 ?

Answer 19

3/5 = 0.6
\[\frac{1}{5}+\frac{1}{5}+\frac{1}{5}=\frac{3}{5}=0.6\]

Answer 20

okay thank you :)

Answer 21

You're welcome :)

Answer 22

ohh wait......u meant all-together.......i thought separately...........sorry man...but yea.............3/5 is thumbs up..

Answer 23

x A B C D
P(x) 0.30 0.20 ? 0.28
Find P(A and B) assuming that A and B are independent.

Do you just add up A & C ?

Answer 24

I Mean C & D *

Answer 25

@kropot72

Answer 26

it will be 0.22

Answer 27

@jamilexl Can you post the whole question please?

Answer 28

he did...as
a different new question

Answer 29

Thanks.

Answer 30

im a she lol but i dont think that matters