“The average marks of 14 students in a class is 63. If the marks of each student are doubled, find the new average.”

Given:
Number of students = 14, Average marks = 63
Total marks of 14 students = $ 14 \times 63 = 882 $
If each mark is doubled, new total marks = $ 2 \times 882 = 1764 $
New average = $ \frac{\text{New total marks}}{\text{Number of students}} = \frac{1764}{14} = 126 $
Answer =126