A combination lock has a code consisting of 3 numbers, each of which can be 0 to 39, with numbers repeated. Jillian says that th
2 answers:
Answer:
Jillian is not correct
Jillian has summed up the possible number of codes for each digit instead of multiplying it
Step-by-step explanation:
The lock has a code that consists of 3 number
It is given that the number in the lock code can be used between to
Thus, out of total set of numbers (i.e
), the numbers can be repeated.
This means for all three code numbers the opportunity of choosing a number is same i.e. between
Now, the first digit of the code can be any number between
Like wise the second and third digit of the code can be any number between
Thus. the possible number of codes with repetition allowed are
Hence, Jillian is not correct
Jillian has summed up the possible number of codes for each digit instead of multiplying it
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