Question

Question #36
The average age of a family of five members is 20 years, the age of the youngest member is 10 years, what was
the average age of the family at the time of the birth of the youngest member?​

Answer 1

Answer:

12 .5 years !!

Step-by-step explanation:

at present total age of family = 5×20= 100

the total age of family at the time of the birth of the youngest member = (100-10-(10×4) )=50

therefore average of family at the time of the birth of youngest member is = 50 / 4 = 12.5years