Probability of numbers between 0 and 1

[deah]

anybody could help me how to solve this..
between nos. 0 and 1, what is the probability that 5 of its first 10 decimal places is less than 5?

 

[berkeman]

How would you first approach this problem yourself?

 

[nicktacik]

A.What is the probability that any given digit is less than 5?

B.What is the probability of 5 out of 10 digits being less than 5, using the probability in A?

 

[HallsofIvy]

In other words, it is a binomial probability problem!

 

[learningphysics]

Exactly five or at least five?

 

[deah]

sorry..

it's at least five..