Exercise :: Average  Data Sufficiency 1
 Average  Important Formulas
 Average  General Questions
 Average  Data Sufficiency 1
 Average  Data Sufficiency 2
Each of the questions given below consists of a statement and / or a question and two statements numbered I and II given below it. You have to decide whether the data provided in the statement(s) is / are sufficient to answer the given question. Read the both statements and
 Give answer (A) if the 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.
 Give answer (B) if the 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.
 Give answer (C) if the data either in Statement I or in Statement II alone are sufficient to answer the question.
 Give answer (D) if the data even in both Statements I and II together are not sufficient to answer the question.
 Give answer(E) if the data in both Statements I and II together are necessary to answer the question.
1. 


Answer: Option D Explanation: P + Q + R + S = (30 x 4) P + Q + R + S = 120 .... (i) I. P + R = 60 .... (ii) II. S = (R  10) .... (iii) From (i), (ii) and (iii), we cannot find R. Correct answer is (D) 
2. 


Answer: Option B Explanation: I. Total candidates interviewed by 3 panels = (15 x 3) = 45. II. Let x candidates be interviewed by C. Number of candidates interviewed by A = (x + 2). Number of candidates interviewed by B = (x + 1). x + (x + 2) + (x + 1) = 45 3x = 42 x = 14 Hence, the correct answer is (B). 
3. 


Answer: Option D Explanation: Let there be x children. I gives, age of teacher = x years. II gives, average age of (x + 1) persons = (x + 1) years. Teacher's age = (x + 1) (x + 1)  x^{2} = (x^{2} + 1 + 2x)  x^{2} = (1 + 2x) Thus, teacher's age cannot be obtained. Correct answer is (D) 