Let the ages of Ajith, Babita, Chetu, Das are A, B, C, D yr. Age of Ajith is three times that of Babita i.e. A = 3 B
Chetu is half the age of Das i.e. C =
Babita is older than Chetu i.e. B > C.
Statement I Chetu is 10 yr old. This statement is necessary to find the age of Ajith.
Statement il This statement is again necessary to find the age of Ajith.
Hence, both statements I and il are necessary to estimate the age of Ajith