There are 6 cards, 2 with stars on them and 4 with circles on them. Two cards are chosen at random.

All of the following probabilities represent dependent events in this scenario except:

A) picking a star, keeping it, and then picking another star.

B) picking a star, replacing it, and then picking a circle.

C) picking a circle, not replacing it, and then picking a star.

D) picking a circle, keeping it, and then picking another circle.

PLEASE CAN U HLP ME IN THIS ONE REALLY FAST??

All of the following probabilities represent dependent events in this scenario except:

A) picking a star, keeping it, and then picking another star.

B) picking a star, replacing it, and then picking a circle.

C) picking a circle, not replacing it, and then picking a star.

D) picking a circle, keeping it, and then picking another circle.

PLEASE CAN U HLP ME IN THIS ONE REALLY FAST??

Guest Mar 4, 2012

#1**0 **

N=6

Ps=2/6 (2 star cards, total 6 cards)

Pc=4/6 (4 circle cards, total 6)

A)

probability for picking a star: Ps

now there is only 1 star card left in total of 5cards: Pss = 1/5 (depends on the first pick)

probability for picking another star: Pss

Total probability: Ps * Pss = 2/6 * 1/5 = 2/30 = 1/15

B)

probability for picking a star: Ps

probability for picking a circle: Pc (depends not on the first pick)

Total probability: Ps * Pc = 2/6 * 4/6 = 8/36 = 2/9

C)

probability for picking a circle: Pc

probability for picking a star: Pcs = 2 / 5

Total probability: Pc * Pcs = 4/6 * 2/5 = 8/30 = 4/15

D)

probability for picking a circle: Pc

probability for picking a circle: Pcc = 3/5 (depends on first pick)

Total probability: Pc * Pcc = 4/6 * 3/5 = 12/30 = 6 / 15 = 2/5

TIARRA:There are 6 cards, 2 with stars on them and 4 with circles on them. Two cards are chosen at random.

All of the following probabilities represent dependent events in this scenario except:

A) picking a star, keeping it, and then picking another star.

B) picking a star, replacing it, and then picking a circle.

C) picking a circle, not replacing it, and then picking a star.

D) picking a circle, keeping it, and then picking another circle.

PLEASE CAN U HLP ME IN THIS ONE REALLY FAST??

N=6

Ps=2/6 (2 star cards, total 6 cards)

Pc=4/6 (4 circle cards, total 6)

A)

probability for picking a star: Ps

now there is only 1 star card left in total of 5cards: Pss = 1/5 (depends on the first pick)

probability for picking another star: Pss

Total probability: Ps * Pss = 2/6 * 1/5 = 2/30 = 1/15

B)

probability for picking a star: Ps

probability for picking a circle: Pc (depends not on the first pick)

Total probability: Ps * Pc = 2/6 * 4/6 = 8/36 = 2/9

C)

probability for picking a circle: Pc

probability for picking a star: Pcs = 2 / 5

Total probability: Pc * Pcs = 4/6 * 2/5 = 8/30 = 4/15

D)

probability for picking a circle: Pc

probability for picking a circle: Pcc = 3/5 (depends on first pick)

Total probability: Pc * Pcc = 4/6 * 3/5 = 12/30 = 6 / 15 = 2/5

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Mar 4, 2012