Question

Only genuis can solve this !​

Answer 1

n = 30 & ∑(xi)  = 170

Step-by-step explanation:

∑ (xi-2)   = ∑(xi)    - 2n  = 110

=>  ∑(xi) = 110 + 2n

∑(xi -5) = ∑(xi)   - 5n    = 20

=>  ∑(xi) = 20 + 5n

110 + 2n = 20 + 5n

=> 90 = 3n

=> n = 30

∑(xi)  = 110 + 2n = 170

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Answer 2

Answer:170

Step-by-step explanation:

N 170