web2.0calc
 
+0  
 

 Help!

0
869
3
avatar+218 

There are 1200 trees in an apple orchard. The owner randomly examined 20 trees and found 3 of them are infested. What is the expected number of infested trees in the orchard?

 Jun 15, 2019
edited by Rudram592  Jun 15, 2019

3+0 Answers

 #1
avatar+209 
-3

Using the ratio, 180 of them are infected. Probably. It's just the expected value.

Hope this Helps.... :P

 Jun 15, 2019
edited by NoobGuest  Jun 15, 2019
 #2
avatar+209 
-3

Or, Using a tiny probabilty, the Famer just found 3/3 infected trees, but 180 infected has my best bets.

NoobGuest  Jun 15, 2019
 #3
avatar+1252 
0

If 3/20 trees are infested and there are 1200 trees total, then 3/20*1200=180 so there should be around 180 infested trees.

 

You are very welcome!

:P

 Jun 15, 2019

0 Online Users

Top Users

avatar+118673 Melody moderator
avatar+37146 ElectricPavlov
avatar+33661 Alan moderator
avatar+14995 asinus moderator
avatar+2489 GingerAle
avatar+1908 NotThatSmart
avatar+1839 ABJeIIy
avatar+1768 bader
avatar+1537 parmen
avatar+1443 blackpanther
avatar+1439 kittykat

Sticky Topics