<span>E[Y] = 0.4·1 + 0.3·2 + 0.2·3 + 0.1·4 = 2
E[1/Y] =0.4·1/1 + 0.3·1/2 + 0.2·1/3 + 0.1·1/4 = 0.4 + 0.15 + 0.0666 + 0.025?0.64
V[Y] =E[Y2]-E[Y]2= (0.4)·12+(0.3)·22+(0.2)·32+(0.1)·42-22= 0.4+1.2+1.8+1.6-4= 5-4 = 1</span>
Answer:
Step-by-step explanation:a or b ?
Answer:
No you wouldn't because you are not dividing or multiplying by a negative number.
Step-by-step explanation:
Answer:
133
Step-by-step explanation:
Answer is 133
Answer:
$20
Step-by-step explanation:
to check
16/20
divide
= .80
times 100
80%
