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If m is the mean of p,q,r,s,t,u,v, then ...

If m is the mean of p,q,r,s,t,u,v, then what is (p-m) + (q-m) + (r-m) + (s-m) + (t-m) + (u-m) + (v-m) equal to ?

A

0

B

s

C

`(p+v)//2`

D

None of the above

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