2. On a roulette wheel, there are 38 slots numbers 1-36 along with 0 and 00. Half of the 36 slots are red and the
other half are black. O and 00 are green slots. Let's say that we walk up to a roulette wheel and place a $5 bet on
black. If the ball lands on a black slot we get our original bet back ($5) plus another $5 for winning. Of course, if the
ball lands on a red or green slot we lose our $5 bet.
What will be our expected gain and standard deviation if we play two games betting $5 each time on black?

answer

step-by-step explanation:

you are playing an adventure game on your computer. you come across a troll who won't let you pass and there is no other way to get to the other side of the river except over the bridge he is guarding.

the troll is a nerd. he takes great delight in watching people struggle with his problems. very few get them. he only gives you one chance and then he changes the puzzle. you have to solve this one.

before you are four blocks. they are numbered 11,6, -7,21.

he tells that the answer he wants is minus and between -1 and - 2. you can use +, -, ×, ÷   ( and ) as many times as you like or no times at all. you don't like the way he's looking at you, but you need to cross the bridge. what do you do?

8 < i think

hope this !