There are 4 positive integral values A B C and D Find the value of C I Average of A B C and D is 42 ...........

Logical Reasoning (RBI) Data Sufficiency

Each question below is followed by two statements I and II. You have to determine whether the data given in the statement is sufficient for answering the question. You should use the data and your knowledge of mathematics to choose the best possible answer.

There are 4 positive integral values A, B, C and D. Find the value of C? I. Average of A, B, C and D is 42 . II. A

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

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.

Data either in Statement I or in Statement II alone are sufficient to answer the question.

Data in both Statements I and II together are necessary to answer the question.

Data even in both Statements I and II together are not sufficient to answer the question.

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Explanation:

Statement I. A+B+C+D = 42*4 = 168 We can’t find answer from this statement. Statement II. B+C = 40*2 = 80 –(i) B-28 = 28-A or, A+B = 56 ----(ii) C-32 = 32-A or, C+A = 64 ----(iii)
From equations i,ii and iii, A+B+C = 80+56+64 /2 =100 Hence, C = (A+B+C) – (A+B) = 100-56 = 44 We can find answer from this statement