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I have solved this but then I got a different answer  here is the question

 

A bag contains some marbles, each of which is one of four colors (red, white, blue, and green). There is at least one of each color. The composition of the bag is such that if we take four marbles out at random (without replacement), each of the following is equally likely:

(1) one marble of each color is chosen,

(2) one white, one blue, and two reds are chosen,

(3) one blue and three reds are chosen,

(4) four reds are chosen.

What is the smallest possible number of marbles in the bag?

 

I got the two answers 10 and 21. Which one is correct??? please explane

 

THX IN ADVANCElaugh

 Aug 27, 2019
 #1
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See here :   https://web2.0calc.com/questions/a-bag-contains-some-marbles-each-of-which-is-one-of-four-colors-red-white-blue-and-green-at-least-one-of-the-marbles-is-red-the-comp

 

 

cool cool cool

 Aug 27, 2019
 #2
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Thx for the halp!! laugh

 Aug 27, 2019
 #3
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7 marbles will do the job. 

 

1)   R    W    B   G

2)   W    B    R    R

3)   B    R    R    R

4)      R    R    R

So, you need:    1blue,  1white,  1green  and  4red  marbles.

 Aug 28, 2019
 #4
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I misunderstood the question; I'm totally wrong! smiley

Guest Aug 29, 2019

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