# statistics with choosing different color balls

• Feb 10th 2009, 02:10 PM
sandeep641
statistics with choosing different color balls
A bag contains 5 red and 3 white balls. Balls are drawn at random; WR means with replacement, WOR means without replacement. Fill in the four columns below.
2 balls drawn 3 balls drawn
WR WOR WR WOR
(statistics) Pr(none are white)
ans)
(statistics) Pr(exactly one is white)
ans)
r (statistics)(exactly two are white)
ans)
r (statistics)(exactly three are white)
ans)
• Feb 11th 2009, 04:07 AM
mr fantastic
Quote:

Originally Posted by sandeep641
A bag contains 5 red and 3 white balls. Balls are drawn at random; WR means with replacement, WOR means without replacement. Fill in the four columns below.
2 balls drawn 3 balls drawn
WR WOR WR WOR
(statistics) Pr(none are white)
ans)
(statistics) Pr(exactly one is white)
ans)
r (statistics)(exactly two are white)
ans)
r (statistics)(exactly three are white)
ans)

One way of doing this would be to draw tree diagrams.