Answer: -41
Step-by-step explanation:
Porobability distribution of X
x P(x)
0 0.2
1 0.4
2 0.4
Total .1.0
i] Expectation
Mean=Σxp
Variance=x²p-(∑xp)²
thus:
Mean=(0*0.2)+(1*0.4)+(2*0.4)
=0+0.4+0.8
=1.2
ii] Variance
Variance=[(0²*0.2)+(1²*0.4)+(2²*0.4)]-(1.2)²
=[0+0.4+1.6]-1.44
=0.56
hence:
standard deviation=sqrt(0.56)=0.74833
Answer:32
Step-by-step explanation:just divided both sides by 12 that will be 348:960=32:80
(2.7, 2.3)
(2, 1.7)
(1.7, 1.3)
again may be wrong
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Step-by-step explanation:
