Discussion of Question with ID = 020 under Data-Sufficiency

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Question

The following question consists of a question followed by two statements labeled I and II. You have to decide whether the data given in the statement (s) is /are sufficient for answering the question.

Balwinder scored an average of 60 marks in English, Mathematics and Computer. How much did he get in Mathematics?

  1. His average score in English and computer is 45.
  2. He got 40 marks in Computers.
A

if data in statement I alone are sufficient to answer the question while the data in statement II alone are not sufficient to answer the question.

B

if data in statement II alone are sufficient to answer the question, while the data in statement I alone are not sufficient to answer the question.

C

if data either in statement I alone or in the statement II alone are sufficient to answer the question.

D

if data even in both the statements together are not sufficient to answer the question.

Soln.
Ans: a

As given in the question, his total marks E + M + C = 180. From statement I, we get E + C = 90. From here his marks of Mathematics are known. Therefore, statement I alone is sufficient to answer the question. Statement II alone is not sufficient because from this C = 40 which can't help us to know the marks of Mathematics.


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