Answer:
im not sure if it right or not because im stupid but i guess 6.5
Step-by-step explanation:
Multiply each X by its corresponding probability P, then add up them up.
E[X] = 3•0.2 + 4•0.1 + 5•0.25 + 7•0.05 + 9•0.4
⇒ E[X] = 6.2
X shortest piece
X+6 middle piece
X+8 longest piece
Add them
3x+14=56
3x=42
X=42/3=14
The answer would be: a > 2
Answer: The correct order
8mm, 41 cm, 790 dm, 788m, 537 km
Step-by-step explanation:
