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Hi guys can someone know how to solve this, can I have formula and solution . Thank you ​

Hi Guys Can Someone Know How To Solve This Can I Have Formula And Solution Thank You class=

Sagot :

Answer:

The symbol Σ (sigma) is generally used to denote a sum of multiple terms.

Step-by-step explanation:

In number 1 you just add the value of X1, X2, X3 and X4 to get the sum.

Σ X = X1 + X2 + X3 + X4

Σ X = 4 + 2 + 5 + 1 = 12

then do the same in number 2 to 3

In number 4,  Σ XY you should multiply first Xand Y before you add them.

Σ XY = X1Y1 + X2Y2 + X3Y3 + X4Y4

Σ XY = (4)(2) + (2)(1) + (5)(0) + (1)(2) = 12

same in number 5 to 7

In number 8, Σ (X + Y)

Σ (X + Y) = (X1+Y1) + (X2+Y2) + (X3+Y3) + (X4+Y4)

Σ (X + Y) = (4+2) + (2+1) + (5+0) + (1+2) = 17

now you can do the rest good luck!