Question

Find out the correct alternative that will fill in the blanks in the given letter series.

aab - aaa - bba -

• A. baa
• B. abb
• C. bab
• D. aab

Answer 1

The correct option is A baa

We proceed step by step as shown below:
1. The first blank space should be filled in by 'b' so that we have two a's followed by two b's.
2. The second blank space should be filled in either by 'a' so that we have four a's followed by two b's, or 'b' so that we have three a's followed by three b's.
3. The last space must be filled in by 'a'.
4. Thus, we have two possible answers: 'baa' and 'bba'. But, only 'baa' appears in the alternatives. So, the answer is (A).
5. In case, we had both the possible answers in the alternatives, we would have chosen the one that forms a more prominent pattern, which is aabb/aaabbb/aa. Thus, our answer would have been 'bba'.