Ratios, % WPs, Overlapping Sets, Statistics, Formula Logic

Question 1

Example of finding ratio where you need to employ part1/(part1+part2)=total

Answer 1

https://images.cram.com/images/upload-flashcard/93/51/79/33935179_m.png

Question 2

DS questions dealing with 3 variable ratios can be challenging. When solving think about using the LCM of the given values of the common variable as an aid in solving the problem: https://images.cram.com/images/upload-flashcard/93/52/14/33935214_m.png

Answer 2

https://images.cram.com/images/upload-flashcard/93/51/80/33935180_m.png

Question 3

Practice examples of variation problems and their solutions..https://images.cram.com/images/upload-flashcard/93/52/63/33935263_m.png

Answer 3

https://images.cram.com/images/upload-flashcard/93/52/41/33935241_m.png

Question 4

Method for solving overlapping set problems where total number of items in overlapping sets is not specified. Variable we can assign is total = 100

Answer 4

https://images.cram.com/images/upload-flashcard/93/52/94/33935294_m.png

Question 5

Example of method for solving overlapping set qs where we are solving for exactly one set

Answer 5

https://images.cram.com/images/upload-flashcard/93/52/99/33935299_m.png

Question 6

Example of method for solving overlapping set problems where total number of items in overlapping sets is not specified…https://images.cram.com/images/upload-flashcard/93/53/82/33935382_m.png

Answer 6

https://images.cram.com/images/upload-flashcard/93/53/79/33935379_m.png

Question 7

Method for solving set problems where you need to find the number in either set (set A or set B)..https://images.cram.com/images/upload-flashcard/93/54/01/33935401_m.png

Answer 7

https://images.cram.com/images/upload-flashcard/93/53/93/33935393_m.png

Question 8

Method for 3 overlapping set problems when the # of unique items is known. Draw out the circles, with the overlaps, and use the formula

Answer 8

https://images.cram.com/images/upload-flashcard/93/54/03/33935403_m.png

Question 9

Method for 3 overlapping set problems when the # of unique items is unknown. Just use the formula

Answer 9

https://images.cram.com/images/upload-flashcard/93/54/07/33935407_m.png

Question 10

If we are given the combined sum of “Exactly two” sets, then we use the formula when total # of unique elements is unknown”

Answer 10

https://images.cram.com/images/upload-flashcard/93/54/15/33935415_m.png

Question 11

Method for comparing standard deviations

Answer 11

https://images.cram.com/images/upload-flashcard/93/55/35/33935535_m.png

Question 12

Example of question comparing standard deviations

Answer 12

https://images.cram.com/images/upload-flashcard/93/55/37/33935537_m.png

Question 13

Example for the impact of adding or subtracting from a data set on the standard deviation

Answer 13

https://images.cram.com/images/upload-flashcard/93/55/72/33935572_m.png

Question 14

Method for counting # of consecutive integers, inclusive of either the first or last numbers in a set

Answer 14

https://images.cram.com/images/upload-flashcard/93/55/95/33935595_m.png

Question 15

Method for counting # of consecutive integers, not inclusive of both the first and last numbers in a set

Answer 15

https://images.cram.com/images/upload-flashcard/93/55/94/33935594_m.png

Question 16

Method for counting # of consecutive multiples in a range, inclusive of the first and last numbers in a set

Answer 16

https://images.cram.com/images/upload-flashcard/93/56/21/33935621_m.png

Question 17

The Bookend Method”. First of the two methods for finding the average of numbers in an evenly spaced range.”

Answer 17

https://images.cram.com/images/upload-flashcard/93/56/34/33935634_m.png

Question 18

The Balance Point Method”. Second of the two methods for finding the average of numbers in an evenly spaced range.”

Answer 18

https://images.cram.com/images/upload-flashcard/93/56/23/33935623_m.png

Question 19

Using the Average Formula to find the sum of a set of evenly spaced integers

Answer 19

https://images.cram.com/images/upload-flashcard/93/56/24/33935624_m.png

Question 20

Example of question re: sum of odd consecutive integers

Answer 20

https://images.cram.com/images/upload-flashcard/93/56/31/33935631_m.png

Question 21

Method for solving % change questions in formula: plug in like normal then use % change formula

Answer 21

Question 22

Phrasing of change from original to new

Answer 22

Question 23

Systematic way of solving formula logic questions.

Answer 23

Question 24

Example of formula logic questions where they ask what will the % change be if “x” occurs?””

Answer 24

Question 25

What two specific questions do formula logic questions ask?

Answer 25