Answer:
The value of ΣXi will be:
[tex]\sum Xi=45[/tex]
Step-by-step 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 [tex]X_i's[/tex]
We are given:
[tex]X_1=3\ ,\ X_2=12\ and\ X_3=30[/tex]
Hence,
[tex]\sum X_i=X_1+X_2+X_3[/tex]
i.e.
[tex]\sum X_i=3+12+30\\\\i.e.\\\\\sum X_i=45[/tex]
Hence, the answer is: 45
