 
 <prompt> ```python
# Python solution
# Given weights
mark_weight = 150
susan_weight = mark_weight - 20
bob_weight = 2 * susan_weight

# Calculate average weight
average_weight = (mark_weight + susan_weight + bob_weight) / 3

print("The average weight of the 3 friends is:", average_weight)
``` <response>: def solution():
    """Ọ bụghị nke Mark bụ 150 pounds na Susan bụ 20 pounds nweta Mark. Na nwoke ha Bob bụ abụọ n'ime Susan. Kedu ihe ọ bụla bụ ihe nke ọzọ n'ime ndị ọzọ?"""
    mark_weight = 150
    susan_weight = mark_weight - 20
    bob_weight = susan_weight * 2
    total_weight = mark_weight + susan_weight + bob_weight
    average_weight = total_weight / 3
    result = average_weight
    return result 