The director of a film festival received 9 submissions, 7 of which were sci-fi films. If the director randomly chose to play 6 of the submissions on the first day of the festival, what is the probability that all of them are sci-fi films? Write your answer as a decimal rounded to four decimal places .

Respuesta :

Given data:

9 submissions out of which 7 were sci-fi

If the director randomly chose to play 6 of the submissions on the first day of the festival

Then, the probability that all of them are sci-fi films will be obtained as follows

At the first selection, it will be: 7/9

At the second selection, it will be: 6/8

At the third selection, it will be: 5/7

At the fourth selection, it will be: 4/6

At the fifth selection, it will be: 3/5

At the sixth selection, it will be: 2/4

Thus, the probability will be

[tex]\frac{7}{9}\times\frac{6}{8}\times\frac{5}{7}\times\frac{4}{6}\times\frac{3}{5}\times\frac{2}{4}=\frac{5040}{60480}[/tex]

=>

[tex]\frac{5040}{60480}=\frac{1}{12}[/tex]

=>

[tex]\frac{1}{12}=0.0833[/tex]

Answer = 0.0833