Thursday

February 26, 2015

February 26, 2015

Posted by **Meg** on Monday, April 30, 2012 at 5:25pm.

- Probability -
**Reiny**, Monday, April 30, 2012 at 5:45pmlet the number of clear marbles added be x

so prob of drawing a red

= 9/(13+x)

9/(13+x) = 3/5

39 + 3x =45

3x= 6

x = 2

2 clears should be added

check:

now the number of marbles would be 15

(9 red, 4 blue, 2 clear)

prob of a red = 9/15 = 3/5

**Answer this Question**

**Related Questions**

math - A bag contains red, blue, and orange marbles. If the probability of ...

algebra 2 - The bag contains three red marbles, two blue marbles, and seven ...

conditional probability - You have two bags of marbles. Bag 1 has 5 red and 6 ...

Math :) - In a bag of 10 marbles, there are 5 blue marbles, 3 red marbles, and 2...

Math - A bag contains nine red marbles, four green marbles, three blue marbles, ...

Math - One bag contains 5 red marbles, 4 blue marbles, and 3 yellow marbles, and...

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

algebra 1 - The bag contains three red marbles, two blue marbles, and seven ...

algebra 2 - A bag contains 7 blue marbles, 5 red marbles, and 9 green marbles. A...

pre-algebra - a bag contains 5 green marbles 2 white marbles 8 blue marbles 9 ...