Wednesday

April 23, 2014

April 23, 2014

Posted by **Ian** on Monday, April 15, 2013 at 3:33am.

Note: You do not place the first marble back into the bag

- Maths -
**Reiny**, Monday, April 15, 2013 at 8:13amcould be RR, GG, YY, or BB

prob RR = (10/40)(9/39) = 3/52

the others are the same calculation

so prob = 4(3/52) = 9/52

now doing the a and b stuff

a=9 , b=52

a+b = 61

- Maths -
**Sahil**, Saturday, April 20, 2013 at 10:27amit is the wrong answer

**Related Questions**

Math - A bag of marbles contains only green and red marbles. All of the marbles ...

Probability? - A bag contains 7 green marbles, 9 red marbles, 10 orange marbles...

math - A bag contains 5 green marbles, 3 yellow marbles and 2 red marbles. What ...

math - sally has a bag with red,blue, and green marbles. She has twice as many ...

Math - Say that a bag contains 100 marbles: 30 red, 30 blue, 30 green, plus a ...

Math - A bag contains 4 blue, 4 red, and 4 green marbles. Four marbles are drawn...

Math - A bag contains 4 blue, 4 red, and 4 green marbles. Four marbles are drawn...

10th grade - mary has a bag which contains 5 green marbles, 7 red marbles, and 9...

Stats - A bag contains 10 red and 8 green marbles. 5 marbles are selected ...

math-algebra - 7. A bag contains 5 red marbles, 6 green marbles, and 9 blue ...