Concept:Average daily wages for five days requires the total wages for all five working days.
Explanation:Statement I gives total wages for the first four days as
₹400.
The fifth day's wage is still unknown.
So, the total five-day wage cannot be determined from statement I alone.
Hence, statement I alone is not sufficient.
Statement II says the worker earned
20% more each day than the previous day.
Given the first day's wage is
₹80, the five daily wages are formed as a geometric progression:
80,80(1.2),80(1.2)2,80(1.2)3,80(1.2)4.
Thus, the total wages for five days can be calculated exactly.
Average daily wages
=5total wages for five days.
Therefore, statement II alone is sufficient to answer the question.
Answer:Option B: If the data in statement II alone are sufficient to answer the question, while the data in statement I alone are not sufficient to answer the question.