# Tutor profile: Ali S.

## Questions

### Subject: Linear Algebra

What number when divided by 6 and then 2 is subtracted from it results in zero?

x/6 -2=0 (x-12)/6=0 x-12=0 x=12. Therefore 12 is the number which when divided by 6 and then 2 is subtracted would result in zero.

### Subject: Numerical Analysis

During the last 5 days, the number of sales you made every day were: 20, 45, 35, 40, 55. What is the mean, mode, and median?

The mean: 20+45+35+40+55/5 = 39/ The mode: we pick the highest value : 55 The median we pick the middle value : 20, 35, 40, 45,55 40 would be the median.

### Subject: Statistics

With examples explain the difference between underfitting and overfitting?

Overfitting pertains to a model that is too specific and underfitting refers to a model that is too general. An example of overfitting would be defining a "dining table" as a rectangular table with four legs, made with wood and a certain height, length and width. The sample example would be underfitting if any table with four legs is considered a "dining table".

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