BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

★★★★★5.0559 reviews
GMATLiveTeach 7 seats left
Chris Peckover
NEXT LIVE COHORT

Oct 13 to Jan 7, 2027

with Chris Peckover

Schedule
Tue, Thu · 8:00 to 10:00 PM ET
Included
40 live hours + 6 months of GMAT OnDemand
  • Live instruction and real-time questions
  • Class recordings and assigned practice
View class & enroll
Limited cohort · enrollment openTarget Test Prep
EALiveTeach 5 seats left
Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

Schedule
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll
Limited cohort · enrollment openTarget Test Prep
GMATOnDemand Start anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

Please can some one solve this probabilty question for me?

Expert replies
by [email protected] » Wed Apr 20, 2011 3:08 am
low rainfall area, the occurence of rain in a city on a particular day is dependnt on whether it rained on previous or not. If it has rained on previous, the probability distribution for rain the next day is...

Event Probability
No rain 0.50
1 cm 0.25
2cm 0.15
3cm 0.05
4cm 0.03
5cm 0.02

If it didnt rain the previous day the probability distribution is as follows
No rain 0.75
1cm 0.15
2cm 0.06
3cm 0.04

Simulate the city`s rain in the next 15 days and find out the total number of days without rainfall and also the total rainfall during these 15 days. It may be assumed that the day before it didnt rain.
You may use the following random numbers.
67,63,39,55,29,78,70,06,78,76,25,48,93,62,84.
Join the discussion
Source: — Problem Solving |

by vineeshp » Wed Apr 20, 2011 7:02 am
Sorry, no answer here.

What are the random numbers for? This doesn't look like a Gmat qn.
Vineesh,
Just telling you what I know and think. I am not the expert. :)
Join the discussion

by jaymw » Wed Apr 20, 2011 8:00 am
low rainfall area, the occurence of rain in a city on a particular day is dependnt on whether it rained on previous or not. If it has rained on previous, the probability distribution for rain the next day is...

Event Probability
No rain 0.50
1 cm 0.25
2cm 0.15
3cm 0.05
4cm 0.03
5cm 0.02

If it didnt rain the previous day the probability distribution is as follows
No rain 0.75
1cm 0.15
2cm 0.06
3cm 0.04

Simulate the city`s rain in the next 15 days and find out the total number of days without rainfall and also the total rainfall during these 15 days. It may be assumed that the day before it didnt rain.
You may use the following random numbers.
67,63,39,55,29,78,70,06,78,76,25,48,93,62,84.
I agree that this really does not have anything to do with GMAT. Granted, there are some few probability questions on the GMAT, but those can be solved in 2 minutes. This one, however, will take significantly longer and from the looks of it I'd say it was taken from a statistics book that was by no means written for the GMAT. Studying with those kinds of questions will much rather hinder than help you!
Join the discussion

by Stuart@KaplanGMAT » Wed Apr 20, 2011 10:42 am
Hi,

as others have noted, this is not even remotely similar to a GMAT question. While it's an interesting statistics problem, people studying for the GMAT can safely ignore it.
Image

Stuart Kovinsky | Kaplan GMAT Faculty | Toronto

Kaplan Exclusive: The Official Test Day Experience | Ready to Take a Free Practice Test? | Kaplan/Beat the GMAT Member Discount
BTG100 for $100 off a full course
Join the discussion