Exercise 45 error

[Extremesarova]

Describe Error
It is asked in the task to find the mode for several columns.
The right answer is:
alcohol | proline
12.37 | 520.0
13.05 | 680.0
Because the mode is not necessarily unique to a given discrete distribution, the probability mass function may take the same maximum value at several points.
In this case, alcohol values are repeated 6 times and proline values are repeated 5 times.

Exercise / Set
Exercise 45 / Set 5

Suggested Fix
I don't know - maybe you can specify in the task that only the first value should be returned or the mode function can be improved so it will return multiple values.

[vopani]

Thank you for sharing this.

Having the mode function output multiple values in case of a tie is a core library functionality and better suited for the official datatable repository.

For the sake of removing the ambiguity here, I've updated the exercise to use columns that have a unique mode value.