Ra01 data sufficiency

568 views
412 views

Published on

data sufficiency

Published in: Education, Technology, Spiritual
0 Comments
2 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
568
On SlideShare
0
From Embeds
0
Number of Embeds
3
Actions
Shares
0
Downloads
0
Comments
0
Likes
2
Embeds 0
No embeds

No notes for slide

Ra01 data sufficiency

  1. 1. DATA SUFFICIENCY
  2. 2. DATA SUFFICIENCY
  3. 3. DATA SUFFICIENCY
  4. 4. DATA SUFFICIENCY
  5. 5. DATA SUFFICIENCY
  6. 6. DATA SUFFICIENCY
  7. 7. • If you find the statement (i) alone is sufficient to answer the question do not blindly put down • A and go on to the next problem. Look at statement (2) alone also. If (2) also is sufficient, the • answer is “D”. • The Data Sufficiency questions usually have two types of solutions. One, in which you are • required to determine only yes or no as the answer, and other, in which a numerical solution • is required. For example,
  8. 8. • Solution Type I • The Data Sufficiency questions which require only a „yes‟ or „no‟ as the answer may appear • like: • Ø Is Binny taller than Sammy? • Ø Is Manu paying more than she should? • Ø Is x > 0? • Ø Is interest paid to the bank in 5 years more than rs.6000? • Solution Type II • The Data Sufficiency questions which require an actual numerical solution may sound like: • Ø How tall is Binny? • Ø How much Manu is paying to her house-maid? • Ø Determine the value of x? • Ø Calculate the interest earned by the bank on a loan of rs.10000 @ 5% per annum for a • term of 2 years? • REMEMBER YOU SHOULD NOT SOLVE THESE PROBLEMS. JUST CHECK • WHETHER THE GIVEN DATA IS SUFFICIENT TO SOLVE THESE PROBLEMS. • You should review the basic concepts of highschool algebra and plane geometry (upto +2 • level). You need not have advanced mathematics background.
  9. 9. • Examples: • How much change does Mahesh receive from a `.5 note? • (i) Mahesh buys a total of 6 oranges at 50 paise each. . • (ii) Mahesh receives more than `.3 in change.
  10. 10. • Look at (I). If Mahesh buys a total of 6 oranges at 50 paise each, it is easy to find how much money Mahesh spends. There is no need to multiply 6 and 50 paise. We can easily find the change from rs.5 note. • Statement (II) does not tell us anything definite so it cannot be used to answer the question. • Thus Choice A is correct.
  11. 11. • How many people are there at the party? • (i) The party has between 20 and 30 people. • (ii) The number of the people at the party is a prime number between 24 and 30. (A prime number cannot be divisible by another number except one and the same number).
  12. 12. • Certainly statement (I) alone cannot answer the question. Now look at statement (II). • The only prime number between 24 and 30 is 29. • Thus statement (II) alone is sufficient to answer the question. • Thus Choice B is correct.
  13. 13. • Is x + y positive? • (i) x3 = 20 y • (ii) y3 = -129
  14. 14. • Look at statement (I). • This does not tell us anything about x + y. • Now, look at the second statement (II). • This tells us that y is negative (since y3 is negative). • But this does not answer our question. • However if y is negative according to statement (II), then according to statement (I) x is also negative. Therefore x + y must be negative
  15. 15. • The first statement implies that y2 > 38 • So statement (I) implies that y2 > 38.and we have answered the question. • Now look at the statement (II). • If y = 7, then y2=49 and certainly 49 > 37. • Thus statement (II) answers our question. Since both the statements (I) and (II) answer our question by themselves, choice D is correct
  16. 16. • What is the perimeter of the triangle ABC? • (i) Triangle ABC is a right triangle. • (ii) The area of triangle ABC = 30.
  17. 17. • Statement (I) alone certainly does not answer our question because the fact that a triangle is a right triangle. Statement (II) tells us that the area is 30. • Statement (2) alone will not tell us what the perimeter of the triangle is.Suppose we look at the statements (I) and (II) together. • Let the sides of the right triangle be x , y ,z. where z is the hypotenuse. The area of the triangle is ½ xy = 30 • We cannot determine the perimeter. So,Choice E is correct.
  18. 18. • The ratio of the prices of three different types of cars is 3:2:5. Find the price of the car of medium price. • A) The difference between the costliest and the cheapest cars is `.30,000. • B) The Cheapest car costs `.20,000. • Ans: C
  19. 19. DS – Ages • Find the age of Amar‟s Wife • A. Amar told Bhavan, “My wife is 24 years older than your daughter. Your wife is 6 years older than my son.” • B. Bhavan told Amar, “ Your wife is as much older than my wife as 7 times the age of my daughter is more than your son‟s age. • Sol: 4 Amar Bhavan Wife y + 24 x Son x – 6 y Given 7y – (x) = (y+24) – (x–6)
  20. 20. DS - from CTS • How many visitors saw the exhibition yesterday? • I. Each entry pass holder can take up to three persons with him / her. • II. In all, 243 passes were sold yesterday. • Ans: E
  21. 21. • How much was the total sale of the company? • I. The company sold 8000 units of product A each costing Rs. 25. • II. The company has no other product line • Ans: D
  22. 22. • In what proportion would Raj, Karan and Altaf distribute profit among them • I. Raj gets two-fifth of the profit. • II. Karan and Althaf have made 75% of the total investment. • Ans: E
  23. 23. • What time did the train leave today. • I. The train normally leaves on time • II. The scheduled departure is at 14.30. • Ans: E.
  24. 24. • On which day in January, Subhas left for Germany? • I. Subhas has so far spent 10 years in Germany. • II. Subhas friend Anil left for Germany on 15th February and joined Subhas 20 days after Subhas arrival. • Ans: B.
  25. 25. TYPE II • In each question, information concerning one or both of the quantities to be compared is given in the item column. • Directions: For each of the following questions, two quantities are given – one in column A and one in column B. Compare the two quantities and mark your answer sheet with the correct conclusion. • Mark A if the quantity in column A is greater. • Mark B if the quantity in column B is greater • Mark C if the two quantities are equal. • Mark D if the relationship cannot be determined from the information given.

×