SOLUTION: A box contains 5 white balls, 3 black balls, and 2 red balls.
A-What is the probability of drawing a white ball?
B- How many white balls must be added to the box so that the prob
Algebra.Com
Question 587944: A box contains 5 white balls, 3 black balls, and 2 red balls.
A-What is the probability of drawing a white ball?
B- How many white balls must be added to the box so that the probability of drawing a white ball is 3/4?
C-How many black balls must be added to the ORIGINAL assortment so that the probability of drawing a white ball is 1/4?
The answer for A is .5, and the answer for B is 10; however, what is the answer for C! I need to show my work...Please help me with this q... Thank you
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A box contains 5 white balls, 3 black balls, and 2 red balls.
A-What is the probability of drawing a white ball?
B- How many white balls must be added to the box so that the probability of drawing a white ball is 3/4?
C-How many black balls must be added to the ORIGINAL assortment so that the probability of drawing a white ball is 1/4?
The answer for A is .5, and the answer for B is 10; however, what is the answer for C! I need to show my work...Please help me with this q...
===============
Let that number of added black balls be "x":
Solve for "x":
(5)/(10+x) = 1/4
---
10 + x = 20
x = 10 (# of additional black balls needed)
================
Cheers,
Stan H.
RELATED QUESTIONS
A box contains 5 white balls, 3 black balls, and 2 red balls.
A-What is the probability... (answered by edjones,filboi)
A box contains 2 white balls, 3 black balls and 4 red balls. What is the probability of... (answered by Alan3354)
a box contains 4 white balls, one black ball and seven red balls. how many white balls... (answered by stanbon)
a box contains 8 white balls, 4 black balls, and 9 red balls.
how many red balls must be (answered by stanbon)
A box contains 6 white balls, 7 black balls, and 5 red balls. How many red balls must be... (answered by macston)
A box contains 4 white balls and 3 red balls. Three balls are drawn from the box without (answered by Boreal)
a box contains 6 identical red balls, 3 identical white balls and 5 identical black... (answered by Edwin McCravy)
There are 5 white balls, 8 black balls, and 1 red ball in a box. How many red balls would (answered by tommyt3rd)
A box contains 4 red balls, 6 black balls, 8 blue balls and 12 white balls. What... (answered by macston)