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Arithmetic Probability

Problem Solving

Among a group of 2,500 people, 35 percent invest in municipal bonds, 18 percent invest in oil stocks, and 7 percent invest in both municipal bonds and oil stocks. If 1 person is to be randomly selected from the 2,500 people, what is the probability that the person selected will be one who invests i...

by palgun

Tue Sep 03, 2019 11:27 pm
Forum: Problem Solving
Topic: Arithmetic Probability
Replies: 9
Views: 9989

#D3

Problem Solving
reply

GHong14 wrote:The sequence a1 a2....an is such that an = (an-1 + an-2)/2 for all n>=3. If a3=4 and a5=20, what is the value of a6.

12
16
20
24
28
We can start off using the equation for a6, for solving which we need a4. we have enough data to find a4 and subsequently a6

by palgun

Tue Sep 03, 2019 11:23 pm
Forum: Problem Solving
Topic: #D3
Replies: 5
Views: 8580

Mean

Problem Solving

The average (arithmetic mean) of the integers from 200 to 400, inclusive, is how much greater than the average of the integers from 50 to 100, inclusive? A.150 B.175 C.200 D.225 E.300 As the range is inclusive and the total number in each of the range is odd number, we will have our average or arit...

by palgun

Tue Sep 03, 2019 11:20 pm
Forum: Problem Solving
Topic: Mean
Replies: 5
Views: 9977

Venn Diagram vs. Formula [Grp 1 + Grp 2 - Both + Neither ]

Problem Solving

A marketing firm determined that, of 200 households surveyed, 80 used neither Brand A nor Brand B soap, 60 used only Brand A soap, and for every household that used both brands of soap, 3 used only Brand B soap. How many of the 200 households surveyed used both brands of soap? A: 15 B: 20 C: 30 D: ...

by palgun

Tue Sep 03, 2019 11:16 pm
Forum: Problem Solving
Topic: Venn Diagram vs. Formula [Grp 1 + Grp 2 - Both + Neither ]
Replies: 18
Views: 38464

Which of the following is equal to 85 percent of 160?

Problem Solving
reply

BTGmoderatorDC wrote:Which of the following is equal to 85 percent of 160?

(A) 1.88
(B) 13.6
(C) 136
(D) 188
(E) 13,600

OA C

Source: Official Guide
An easy question due to its answer choices. C-136. Don't need to calculate.

by palgun

Tue Sep 03, 2019 11:07 pm
Forum: Problem Solving
Topic: Which of the following is equal to 85 percent of 160?
Replies: 3
Views: 1043