A bag contains five Gold marbles, seven silver marbles and 23 black marbles. The rules of the game are as follows: you randomly select one marble from the bag. If it is gold you win six dollars, if it is silver you win two dollars. It costs one dollar to play. What is your expected profit or loss if you play the game?

the expected value of the random variable : 0, 1 and 2

step-by-step explanation:

let's solve your equation step-by-step.

4x+2=2x+12

step 1: subtract 2x from both sides.

4x+2−2x=2x+12−2x

2x+2=12

step 2: subtract 2 from both sides.

2x+2−2=12−2

2x=10

step 3: divide both sides by 2.

2x

2

=

10

2

x=5

step-by-step explanation:

step-by-step explanation:

infinity is the answer