Thursday
July 24, 2014

Homework Help: Probability/Statistics

Posted by Jon on Thursday, February 7, 2008 at 10:17am.

1)Two marbles are chosen at random from a bag containing 3 blue and 2 red marbles. The relative-frequency histogram shows the distribution of the number of red marbles chosen. Find P(0 red). (the gragh shows 3/10 for 0 red, 3/5 for 1 red, and 1/10 for 2 red)

A)0
B)8/15
C)3/10
D)2/5
I chose C

2)A red die and a blue die are tossed. What is the probability that the red die shows a 3 and the blue die shows a number greater than 3?

A)1/10
B)1/5
C)1/12
D)3/5
I chose C

3)Tickets are numbered 1 to 50 and placed in a box. Three tickets are drawn at random without replacement. What is the probability that their numbers are all greater than 25?

A)1/8
B)23/196
C)69/625
D)1/2
I chose D

4)From 4 yellow and 8 blue marbles, 3 are selected. What is the probability that all 3 are yellow or all 3 are blue.

A)3/11
B)1/55
C)14/55
D)3/220
I don't know I GUESS A

5)A card is drawn from a standard deck of cards. What is P(heart or a 6)?

A)9/26
B)17/52
C)1/4
D)4/13
I chose B

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