Answer:
Tess = 71 y/o
Nina = 63 y/o
Katy = 55 y/o
Step-by-step explanation:
First step: divide their age equally.
189÷3 = 63 years old / person
Second step: calculate the different between their age.
Tess>Nina>Katy
Different between:
Katy and Tess
= 16 years
Nina and Katy
= 8 years
Tess and Nina
= 16–8
= 8 years
Third step: Calculate their age.
Tess = 63+8
= 71 years old (because she is 8 years older than Nina and 16 years older than Katy)
Nina = 63 years old ( it doesn't change because she is in the middle)
Katy = 63–8
= 55 years old (because she is 8 years younger than Nina and 16 years younger than Tess)
To confirm, you can sum their age and check the age differences like what have been told in the question either it is correct or not.
71+63+55
= 189 years
