You are playing a game where you are rolling a fair 6-sided number cube. It costs $1.00 for every roll. If you roll an even number, you win $2.00. If you roll an odd number, you win win nothing. Which of the following is the expected value of this game?
Expected value=$ -0.50
Expected value=$0.50
Expected value=$1.00
Expected value=$-1.00
Another q&a
When rolling two 6-sided number cubes, what are the chances the sum of the roll will be 7?
1/9
1/36
1/6
1/12
+2498 2.
1+6=7
2+5=7
3+4=7
------------------------------
4+3=7
5+2=7
6+1=7
there is 36 posibilities:
\(\frac6{36}=\frac16\)
Answer: (C)
