Consider the given question and decide which of the following statements is sufficient to answer the question.
When did Mr. Y purchase his car?
Statements:
1. Certainly before 18th August but not before 15th August.
2. Certainly after 16th August but not later than 19th August.

From statement 1 Certainly before 18 August but not before 15th August.

probability of car purchased can be either 16 or 17 August but the exact day cannot be found

 From statement 2 Certainly after 16th August but not later than 19th August.

probability of car purchased can be either 17 or 18 August but the exact day cannot be found

If both the statements 1 & 2 are combined we found that

Car is purchased on 17th august 

Both statement 1 and 2 are sufficient