Answer:
57%
Step-by-step explanation:
Data provided in the questions
Total people visited paris for weekend break = 30
Out of which
Group of 13 visited the eiffel tower (ET)
The other group of 16 visited the no tre-dame cathedral (NDC)
And, the remaining 7 did not visited any place
Now to find out the person visited only one of the two places we need to divide it by the total number of persons visited at one place only by the total number of persons
So, the total number of persons visited at one place only is
= 13 + 16
= 29
And if we add 7 persons so it would be 36
But in actual it is 30 people so there is an addition of 6 persons
That means these 6 persons visited two places so we ignored it in both the groups
So.
For eiffel tower
= 13 - 6
= 7
And for Cathedral, it would be
= 16 - 6
= 10
Now add these two
= 10 + 7
= 17
So, the probability would be
[tex]= \frac{17}{30}[/tex]
= 57%
