Equation with summation symbol in numerator and denominator I am having some difficulty understanding the following formula (primarily because of presence of a summation symbol in the denominator)
$ A = \frac{ \sum_{i=0}^1 (x_i+1) \times P_i} {\sum_{i=0}^1 P_i} $
Here is my interpretation of what the formula means
$A = \frac {((x_0+1)\times P_0)}{P_0}  + \frac{((x_1+1)\times P_1)}{P_1} $
Am I getting this right ? Any suggestions would be appreciated

No this is not right. You treat the numerator and the denominator independently. A is one fraction, not a sum of fractions as you have written. What you have written would be the case if it were $\sum_{i=0}^1 \frac{(x_i+1)P_i}{P_i}$.
