[sumit82]

Can someone help me with this, I can;t get where exactly I am going wrong.....


Q. Kurt, a painter, has 9 jars of paint 4 of which are yellow, 2 are red and the remaining jars are brown. Kurt will combine 3 jars of paint into a new container to make a new color which he will name according to the following conditions:

Brun Y if the paint contains 2 jars of brown paint and no yellow
Brun X if the paint contains 3 jars of brown paint
Jaune X if the paint contains at least 2 jars of yellow
Jaune Y if the paint contains exactly 1 jar of yellow

What is the probability that the new color will be jaune?

A) 5/42
B) 37/42
C) 1/21
D) 4/9
E)5/9

I did.........

4/9*5/8*4/7 + 4/9*3/8*5/7 + 4/9*3/8*2/7

= 41/126

??????

[maddevil]

Originally Posted by sumit82

Can someone help me with this, I can;t get where exactly I am going wrong.....


Q. Kurt, a painter, has 9 jars of paint 4 of which are yellow, 2 are red and the remaining jars are brown. Kurt will combine 3 jars of paint into a new container to make a new color which he will name according to the following conditions:

Brun Y if the paint contains 2 jars of brown paint and no yellow
Brun X if the paint contains 3 jars of brown paint
Jaune X if the paint contains at least 2 jars of yellow
Jaune Y if the paint contains exactly 1 jar of yellow

What is the probability that the new color will be jaune?

A) 5/42
B) 37/42
C) 1/21
D) 4/9
E)5/9

I did.........

4/9*5/8*4/7 + 4/9*3/8*5/7 + 4/9*3/8*2/7

= 41/126

??????

hey,
there is already a thread for prob ques plz post ur que there. i am posting the link below.

http://www.pagalguy.com/cat/showthre...lity+questions

D.M.

[sumit82]

Originally Posted by maddevil

hey,
there is already a thread for prob ques plz post ur que there. i am posting the link below.

http://www.pagalguy.com/cat/showthre...lity+questions

D.M.

I don't want to start a thread or something for probability... I just need to know where I am going wrong.

I see no harm pasting it here

[Gauravix]

bhai sumit...


its simple...probablity of not choosing yellow is 5/9*4/8*3/7 = 5/42
Hence, probablity of having included yellow is 1-5/42 = 37/42 (which is the probability that the new color will be jaune, which needs either exact one yellow jar, or two, or three)

hope it helps..!!!

gaurav