CAT DILR Questions | CAT Data Sufficiency questions
Comprehension
Directions for Questions: These questions are based on the information given below
Each question is followed by two statements, A and B. Answer each question using the following instructions :
Choose (a), if the question can be answered by using one of the statement alone but not by using the other statement alone.
Choose (b), if the question can be answered by using either of the statement alone.
Choose (c), if the question can be answered by using both statements together but not by either statement alone.
Choose (d), if the question cannot be answered on the basis of the two statements
CAT/2004
Question . 14
Tarak is standing 2 steps to the left of a red mark and 3 steps to the right of a blue mark. He tosses a coin. If it comes up heads, he moves one step to the right; otherwise he moves one step to the left. He keeps doing this until he reaches one of the two marks, and then he stops. At which mark does he stop?
A : He stops after 21 coin tosses.
B : He obtains three more tails than heads.
Explanatory Answer
Method of solving this CAT DILR Question from Data Sufficiency question
(b) Here the answer can be obtained from both the statements individually. In A : 21 tosses takes him to a mark which is possible only with 12 Tails & 9 Heads and he reaches the blue mark. In B : In this case ha clearly reaches the blue mark