December 18, 2014

Homework Help: math

Posted by Reiny on Thursday, May 17, 2007 at 10:14pm.

break it down into cases

at most one day of rain in 3 days to me means we could have:

norain norain norain ----> (1/3)^3 = 1/27
rain norain norain -------> 2/3(1/3^2 = 2/27
norain rain norain -------> same as above = 2/27
norain norain rain -------> same as above = 2/27

since there is an OR between these probabilities and there are no overlaps we simply add these
so 1/27 + 3(2/27) = 7/27

The probability of rain on any given day is 2/3. What is the probablity of at most one day of rain during the next three days...i dont get this problem plz explain the steps :)

Answer this Question

First Name:
School Subject:

Related Questions

Science - For million of years, wind and rain have worn down the earth. The land...
Meterology - What does it mean when a Meterologist calls for 50% chance of rain...
Statistic - Day: P(Rain)=0.2 Week: P(Rain on two days)=;
statistics - in a beach side suburb it rains on 20% of days and is windy on 30% ...
math - estimate the difference in precipitation between 124 days of rain in N.N...
Math - The probability of rain falling on the roof of Adamís dorm on any given ...
statistics - the average amount of rain per year in Greenville is 49 inches. the...
probability - Before leaving for work, Victor checks the weather report in order...
physical science - During a rain storm, rain comes straight down with a velocity...
scince - During a rain storm, rain comes straight down with velocity Vi =-15 m/s...