Which situation results in a final value of zero

Explain why the factor 1.5 is broke. into two numbers in the model.

The number of chocolate chips in a bag of chocolate chip cookies is approximately normally distributed with a mean of 12611261 chips and a standard deviation of 118118 chips. (a) determine the 2626th percentile for the number of chocolate chips in a bag. (b) determine the number of chocolate chips in a bag that make up the middle 9696% of bags. (c) what is the interquartile range of the number of chocolate chips in a bag of chocolate chip cookies?

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)