a pencil from the box and then choose another pencil without replacing the 1st one, find the probability of choosing yellow, then blue [1/7 or 1/12 or 2/27 or 5/17?
6 red,4 blue and 2 white chips are in a box,find the odds of choosing a blue chip from the box[4-12 or 3-1 or 2-1 or 4-8?, refer to question just asked; find the odds of choosing a red or white chip [6-2 or 2-6 or 8-4 or 6-6
2006-07-30 06:53:25 · 3 answers · asked by Anonymous in Education & Reference ➔ Words & Wordplay
a box contains 3 yellow,2 blue, 4 red pencils -- total of 9
probability of choosing yellow = 3/9 = 1/3
keep that yellow one then pick another
you have left in the box 2 yellow, 2 blue, 4 red -- total of 8
probability of choosing blue = 2/8 = 1/4
probability of choosing yellow then blue = 1/3 * 1/4 = 1/12
6 red,4 blue and 2 white chips --- total of 12
probability of choosing blue = 4/12 = 1/3
probability of choosing red = 6/12
probability of choosing white = 2/12
probability of choosing red or white = 6/12 + 2/12 = 8/12 = 2/3
2006-07-30 07:03:52 · answer #1 · answered by math guru 4 · 0⤊ 0⤋
total pencils = 9
yellow probability = 3/9
total pencils = 8
blue probability = 2/8
total chips = 12
blue probability = 4/12
red or white probability = 8/12
2006-07-30 14:00:36 · answer #2 · answered by Anonymous · 0⤊ 0⤋
ahhh who cares.
2006-07-30 14:07:55 · answer #3 · answered by yournotalone 6 · 0⤊ 0⤋