Question

If X1=3, X2=12, and X3=30, then what is ΣXi?

Answer 1

∑Xi = X1 + X2 + X3 = 3 + 12 + 30 = 45.

Answer 2

The value of ΣXi will be:

`\sum Xi=45`

Explanation:

We know that the summation sign represents the sum of two or more quantities.

Here we are asked to find ΣXi , this means that we have to sum up the given variable
`X_i's`

We are given:

`X_1=3\ ,\ X_2=12\ and\ X_3=30`

Hence,

`\sum X_i=X_1+X_2+X_3`

i.e.

`\sum X_i=3+12+30\\\\i.e.\\\\\sum X_i=45`

Hence, the answer is: 45