# Data Sufficiency Quiz Set 016

### Question 1

The following question contains a question and two statements giving certain information. Decide whether the information given in statements are sufficient for answering the question.

Does TV viewing affect the performance of students?

1. The number of failures in class XII is more this year.
2. TV watching is harmful to the eyes.
A

if the statement I alone sufficient to answer.

B

if statement II alone is needed.

C

if both statements I and II are needed.

D

if both statements I and II are not sufficient to answer the question.

Soln.
Ans: d

Neither of the statement I and II contains sufficient data to answer the question. The failure could be because of other factors like bad teachers. If TV watching is harmful to the eyes then it doesn't prove that it affects the performance of students.

### Question 2

You have to decide whether the data provided in the statements are sufficient to answer the question. Read the statements and give your answer.

How many children are there in the row of children facing North?

1. Veena who is fifth from the left end is eighth to the left of Anush who is twelfth from the right end.
2. Rohan is fifth to the left of Neeta who is seventh from the right end and eightieth from the left end.
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.

B

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

D

if the data given in both the statements I and II together are not sufficient to answer the question.

Soln.
Ans: c

Both the statements are individually sufficient to answer the question because the positions are given from both the ends.

Using statement I only.Position of Veena from right = position of Anush from right + 8 = 12 + 8 = 20. Total children = position of Veena from left + right -1 = 5 + 20 - 1 = 24.

Using statement II only. Total children = position of Neeta from left + right -1 = 18 + 7 -1 = 24.

### Question 3

You have to decide whether the data provided in the statements are sufficient to answer the question. Read the statements and give your answer.

What is the average salary of three employees P, Q and R of an organization?

1. P and Q together earn Rs 60 more than R, and R earns Rs 100.
2. Q's salary is half of the combined salary of P and R.
A

if statement I alone is sufficient but statement II alone is not sufficient.

B

if statement II alone is sufficient but statement I alone is not sufficient.

C

if both statements I and II together are sufficient but neither of statements alone is sufficient.

D

if each statement alone is sufficient.

Soln.
Ans: a

From statement I, P + Q = 160 and R = 100. Average salary now can be calculated. Statement II is not sufficient to answer the question.

### Question 4

You have to decide whether the data provided in the statements are sufficient to answer the question. Read the statements and give your answer.

How many sisters does P have?

1. T and V are only sisters of D.
2. D is brother of P.
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.

B

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

D

if the data in both the statements I and II together are necessary to answer the question.

Soln.
Ans: d

From both the statements, it is clear that P has two sisters T and V.

### Question 5

You have to decide whether the data provided in the statements are sufficient to answer the question. Read the statements and give your answer.

How many students did secure 1st class in a class of 48 students?

1. Double the number of 1st class students secured 2nd class and all the remaining failed.
2. Number of students failed was thrice the number of 1st class students in the class.
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.

B

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

D

if the data in both the statements I and II together are necessary to answer the question.

Soln.
Ans: d

Let x students score first class. Then by statement I, failed = 48 - 3x. And, by statement II, 48 - 3x = 3x, which gives x = 8.

Hence, I and II together are necessary to answer the question.