Probability that the lock code consists of all even digits is if we choose the digit lock is randomly from numbers
How can we find the probability that the lock code consists of all even digits?
Total numbers are
And we choose digit code
So probability of choosing numbers from numbers without reapitation is
For All numbers are even , probability the last digit of number is even.
So we have even number and if we fix one on last digit and can change other then the probability is
So the total probability of code lock having all even number is
Learn more about the probability is here :
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