Use the trick x+ y+ z =0 and 6+8+z=0,...so z= -14
Answer:
The standard deviation is 2.6832815729997
Step-by-step explanation:
SD^2=(12-12)^2+...+(14-12)^2/10
SD^2=72/10
SD^2=7.2
SD=squeare root of 7.2
SD=2.6832815729997
Answer:
3/4-7/9+2/3=0.63
Step-by-step explanation:
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