@vikas_saini a few doubts, please clarify them -

In cases where using either of the two given statements, we don't get a unique answer, shouldn't we mark the answer as 'can't be solved using either of the two statements' ?

For example, take the question -

When three times of the unit's digit of a number is subtracted from the number,28 is obtained.

What is the number ?

A. The digit at the ten's place is greater than the digit at the unit's place.

B. The digit at the ten's place is less than the digit at the unit's place.

from statement A, we got answer as 31, from statement B it is 46, so isn't this conflicting?

Second Doubt

In a class of 200 students, the highest and the lowest scores in a test are 98 and 18 respectively. Is 50 the average score of the class in the test ?

A. 100 students score above 50 and the remaining 100 students score below 50 in the test.

B. If the highest score and the lowest score in the test are excluded, the sum of the top 99 scores is exactly double of the sum of the bottom 99 scores.

here we are to only ascertain if 50 is class average or not? So, doesn't statement B lead to a conclusion that the average is beyond 50?