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If a^(2)+b^(2)+c^(2)=16,x^(2)+y^(2)+z^(2...

If `a^(2)+b^(2)+c^(2)=16,x^(2)+y^(2)+z^(2)=25` and `ax+by+cz=20` then the value of `(a+b+c)/(x+y+z)`

A

`3/5`

B

`5/3`

C

`4/5`

D

`5/4`

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