It is currently 24 Mar 2019, 11:30

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# John will spend the summer in one of the houses either on

Author Message
TAGS:
GRE Prep Club Legend
Joined: 07 Jun 2014
Posts: 4857
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 105

Kudos [?]: 1783 [0], given: 397

John will spend the summer in one of the houses either on [#permalink]  09 Dec 2017, 19:21
Expert's post
00:00

Question Stats:

100% (01:33) correct 0% (00:00) wrong based on 2 sessions
John will spend the summer in one of the houses either on Surf Street or Breaker Way. Surf Street has 1 landside house and 4 beachside houses, and Breaker Way has 1 beachside house and 2 landside houses. A sea turtle randomly lays eggs in front of a beachside house on Surf Street, and another sea turtle randomly lays eggs in front of a beachside house on Breaker Way. What are the probabilities that a sea turtle lays its eggs in front of John’s house, depending on which street he lives on?

A. $$\frac{4}{25}$$
B. $$\frac{1}{5}$$
C. $$\frac{4}{15}$$
D. $$\frac{1}{3}$$
E. $$\frac{17}{25}$$

[Reveal] Spoiler: OA
B, D

Drill 3
Question: 5
Page: 528-529

_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

GRE Prep Club Legend
Joined: 07 Jun 2014
Posts: 4857
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 105

Kudos [?]: 1783 [0], given: 397

Re: John will spend the summer in one of the houses either on [#permalink]  29 Dec 2017, 14:22
Expert's post
Explanation

If you pare down the problem, then it is much simpler than it first appears. There will be 1 house on Surf Street at which a turtle will lay its eggs; this is “the number of outcomes you want.”

There are a total of 5 houses, which is the “total number of possible outcomes.” Therefore, if John spends the summer on Surf Street, the probability of John staying in the house where the sea turtle will lay its eggs is choice B, $$\frac{1}{5}$$, and the information about the landside houses versus seaside houses actually turns out to be unnecessary.

Similarly, if John stays on Breaker Way, there will be 1 house that a turtle will lay its eggs at out of a total of 3 possible houses that John could live in. Therefore, if he lives on Breaker Way, there is a $$\frac{1}{3}$$chance that the turtle lays its eggs outsides John’s house, and this makes choice D correct.
_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

Re: John will spend the summer in one of the houses either on   [#permalink] 29 Dec 2017, 14:22
Display posts from previous: Sort by