The average age of 5 sisters is 20 yr. If the age of the youngest sister be 4yr. What was the average age of the group of sister at the birth of the yongest sisiter ?

The average age of 5 sisters is 20 yr. If the age of the youngest sist

1.	The average age of 5 sisters is 20 yr. If the age of the youngest sister be 4yr. What was the average age of the group of sister at the birth of the yongest sisiter ?
A.	25 yr
B.	15 yr
C.	18 yr
D.	20 yr
E.	None of the above
Answer» E. None of the above

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The average age of 5 sisters is 20 yr. If the age of the youngest sister be 4yr. What was the average age of the group of sister at the birth of the yongest sisiter ?

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