Step-by-step explanation:

The new mode of the new series is x-3.

Step-by-step explanation:

Mode of data is the number which has highest frequency.

It is given that mode of certain scores is x . It means x is the score with highest frequency.

If each score is decreased by 3, then the score x is also decreases by 3.

So, the new mode of the score is

\text{New Mode}=x-3New Mode=x−3