Time remaining:
Suppose 120 vampires are at an undead convention. They have the following

Mathematics
Tutor: None Selected Time limit: 0 Hours

(a) How many vampires have none of the three restrictions? 

(b) If we select a vampire at random from among those who can't abide garlic, what is the probability that

they suff er from another restriction as well? 

71 shy away from holy symbols; 64 can't abide garlic;51 must sleep in their own coffins; 38 shy away from h.s. and can't abide garlic;36 shy away from h.s. and must sleep in their own coffs; 29 can't abide garlic and must sleep in their own coffs;17 suff er from all three restrictions.

Apr 11th, 2015

Take the sum 71 + 64 + 51 = 186. This could have been the number of vampires that have at least one restriction but those with two restrictions are counted twice and those with all three restrictions are counted thrice.

So we need to make the necessary corrections: 71 + 64 + 51 - 38 - 36 - 29 + 17 = 100 is the number of vampires that have at least one restriction. Finally, 120 - 100 = 20 vampires have none of the three restrictions. 

Apr 11th, 2015

Did you know? You can earn $20 for every friend you invite to Studypool!
Click here to
Refer a Friend
...
Apr 11th, 2015
...
Apr 11th, 2015
Dec 3rd, 2016
check_circle
Mark as Final Answer
check_circle
Unmark as Final Answer
check_circle
Final Answer

Secure Information

Content will be erased after question is completed.

check_circle
Final Answer