+0

# Probability question

0
50
3
+24

I'm confused because I wasn't there for the meeting, thank you for your help.

May 9, 2020

#1
+20906
+2

Reading across the top row (the "has a dog" row):

--  16 persons both have a dog and have a cat

--  6 persons have a dog but do not have a cat

--  there is a total of 22 persons who have a dog

Reading across the next row (the "does not have a dog" row):

--  4 persons do not have a dog but do have a cat

--  3 persons have neither a dog nor a cat

--  there is a total of 7 persons who do not have a dog

Reading down the first column (the "has a cat" column):

--  16 persons have both a dog and a cat

--  4 persons have a cat but no dog

--  there is a total of 20 persons who have a cat

Reading down the next column (the "does not have a cat" column):

--  6 persons do not have a cat but they do have a dog

--  3 persons have neither a dog nor a cat

--  9 person do not have a cat

The 29 in the lower right-hand corner box shows the total number of people.

To answer the first question:  22 out of 29 have a dog, for a probability of 22/29.

To answer the second question:  only 3 do not have either a cat or a dog, so 26 have one or the other (or both):  26/29

May 9, 2020
#2
+1498
0

Disregard my earlier suggestion

hugomimihu  May 9, 2020
edited by hugomimihu  May 9, 2020
edited by hugomimihu  May 9, 2020
#3
+109519
+1

Att:  Hugo

Have you actually drawn the Venn diagram for yourself ?

I suspect that you have not.

If you give people suggestions you must either have solved it that way for yourself

OR

You must state clearly that it is a suggestion but you have not actually done the question or seen if your suggestion is any real value.

There is nothing more frustrating than trying to follow the obscure instruction of an answerer and then finding out later that they were totally wasting your time.

Melody  May 9, 2020