The correct option is B 3n+5
Step 1:
Number to be thought be n
Step 2:
Triple the number you thougt i.e., 3×n=3n
Step 3:
Add 5–– to the number obtained in step 2 , i.e., 3n+5
As a result, 3n+5 is the new number formed.
Therefore, option (b.) is the correct choice.