Suppose you and a friend are playing a game that involves flipping a fair coin 3 times. Let x = the number of times that the coin shows heads. The probability distribution of X is shown in the table.
Number of Heads
0
1
2
3
Probability
0.125 0.375
0.375 0.125
The expected number of heads is
The standard deviation of the number of heads is
Round to three decimal places.
Done

The answer is option c.

Dagriculture is the answer -explanation-

Look, when you want to do something like put it like x^2. x2 could mean x² or x₂. so to clear confusion, know the notation. to find the product multiply the x's and you get -8x and the y's and you get 6y. since it's all being multiplied it is just -8x6y, or answer a. although the better answer is -48xy(combining -8 and 6) because you should multiply constants whenever you can.