4 red balls numbered 1 thru 4 and 3 blue balls numbered 3-5are placed in a bag, a ball is drawn from?

Question

the bag, find the probability of choosing a red or 5 ball? refer to question just asked, find the probability of choosing a blue or 4 ball?
spinning wheel 1,4,5,8 are white; find probability of spinning a white or 8? [2,3,6,7 are black; find probability of spinning black or an even number?

Answer 1

a.
the probability of getting a red ball
= number of red balls present / total number of balls
= 4/7

the probability of getting a 5-ball
= 1/7 since only one such ball is present

therefore:
probability of choosing a red or 5 ball
= 1/7 + 4/7 = 5/7

b.
the probability of finding a blue ball
= number of blue balls present / total number of balls.
= 3/7

the probability of getting a 4-ball
= 2/7 (since two are present)

so total probability of finding a blue or 4 ball is = 2/7 + 3/7 = 5/7


i didnt read the one on the wheel so i'll jut skip that... i do hope that you understand what i just typed down and that it helped.

Answer 2

4 red balls numbered 1 thru 4, and 3 blue balls numbered 3-5, are placed in a bag, a ball is drawn from the bag. Find the probability of choosing a red or 5 ball. refer to question just asked, find the probability of choosing a blue or 4 ball?

A spinning wheel 1,4,5,8 are white; find probability of spinning a white or 8? [2,3,6,7 are black; find probability of spinning black or an even number
When finding probability, you determine the total number of possibilities, and enter that in the denominator y in x/y. The number of desired or actual outcomes you enter in x, the numerator. Then divide or simplify.
Have you tried reading your math book? Much of this should become easier and more fun when you read and understand it your own self. You will develop a feeling of pride in being able to do it your own self, and you'll have fun doing it. Happened to me.

Choosing a red: 4 out of 7 chance.
Choosing the five: 1 out of 7 chance.
Choosing a blue: 3 out of 7
Choosing a 4: 2 out of 7

White: 50% or 4 out of 8
8: 12.5% or 1 out of 8
Black: 50% or 4 out of 8
Even: 50% or 4 out of 8.

I have found an online lesson which seems to make it clear and easy. I hope that you will give it a try. :)

Answer 3

choosing a red or 5 ball 5/7
choosing a blue or 4 ball 4/7
probability of spinning a white or 8 1/2
probability of spinning black or an even number 1

Answer 4

A)
P(Red ball or 5 ball) = P(Red ball) + P(5 ball) - P(Red ball and 5)
=(4/7) + (1/7) - 0 = 5/7

B)
P(Blue ball or 4 ball) = P(Blue ball) + P(4 ball) - P(Blue ball and 4)
=(3/7) + (1/7) + 0 = 4/7

C)
P(white or 8) = P(white) + P(8 spin) - P(white and 8 spin)
=(4/8) + (1/8) - (1/8) = 4/8 1/2

D)
P(black or even) = P(black) + P(even #) - P(black AND even)
=(4/8) + (4/8) - (2/8) = 6/8 = 3/4

Answer 5

probability of choosing a red ball 4:7 probability of choosing a "5" ball 1:7 therefore, the probability of choosing a red or "5" ball would be 5:7

That's all of your homework I'm going to do for you!

Answer 6

Choosing a red: 4 out of 7 chance.
Choosing the five: 1 out of 7 chance.
Choosing a blue: 3 out of 7
Choosing a 4: 2 out of 7

White: 50% or 4 out of 8
8: 12.5% or 1 out of 8
Black: 50% or 4 out of 8
Even: 50% or 4 out of 8.

Do your own homework next time.

Answer 7

red or 5 -> 5 out of 7 (4 reds plus one 5-ball)
blue or 4 -> 4 out of 7 (3 blue plus one red-4 ball)
4 out of 8.

By heart: 5/7 = 0.714285 -> 71%
4/7 = 0.571428 -> 57%
4/8 = 0.5 -> 50%

Answer 8

Figuring this out isn't worth my time. It's the kind of question asked in introductory statistics courses, and posing it, I think, was frivolous. If you're serious about wanting the answer, see any introductory stat text, or (for example) LaPlace's famous Philosophical Essay on Probabilities, written in about 1725 and available at low cost thru Dover Books, whose address you can find on the internet.

Answer 9

Probablility Tree. I would try it but I hate them. Boo for math.

Answer 10

Stop with asking people math, do it your frickin self!