" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Verified answer
A.b= u12-u1/12-1
= 111-11/12-1
= 110/11
= 10
B.
b= u20-u1/20-1
= 250-3/19
= 247/19
= 13