To find probability, you'd have to find the total number of marbles (5+3+6+6=20), and since there are 3 blue marbles, the probability of picking one is 3 out of 20, or 3/20
If that blue marble isn't replaced, there will then be 19 marbles, and 2 blue ones. So the probability of him picking another blue marble is 2/19
Solution
1) <span>Simplify <span><span>−5n−4n</span></span> to <span><span>−9n</span></span>
</span><span><span>−9>−9n
</span></span>
2) <span>Divide both sides by <span><span>−9</span></span>
</span><span><span>1<n
</span></span>
3) <span>Switch sides
</span><span><span>n>1</span></span>
