CAT DILR Questions | CAT Data Sufficiency questions
Comprehension
Directions for Questions: These questions are based on the information given below.
In each question, you are given certain data followed by two statements, for answering the question
Mark (a) , if the question can be ansered with the help of one of the statements, but not with the help of the other statement.
Mark (b), if the question can be answered with the help of either of the statements alone.
Mark (c), if the question can be answered only with the help of both the statements
Mark (d), if the question can not be answered even with the help of both the statements together
CAT/1999
Question . 59
3 person were given certain calculations to perform. The calculations were 1 + 1, 1 +1+2, and 1 +2. Their respective answers were 3,3 and 2. How many of them are mathematicians
I. Mathematicians can never add two numbers correctly, but they add three numbers correctly
II. Whenever the mathematicians add two numbers there is a mistake of +1 or -1
Explanatory Answer
Method of solving this CAT DILR Question from Data Sufficiency question
(d) From the first statement it gives that mathematician can never add 2 number correctly, but it is quite possible that apart from mathematician, others can also do the same mistake. The same logic is applied for the second statement as mathematician is given. If it is only mathematician then we can answer with the help of both the statements.