Answer:
The probability that the locker code begins with a prime number is:
2/5 = 40%
The probability that the last digit is an odd number which will make the locker code an odd number is:
3/5 = 60% ....
Step-by-step explanation:
According to the given statement Brian's school locker has a three-digit combination lock that can be set using the numbers 5 to 9 (including 5 and 9), without repeating a number.
Therefore the digits that can be used in the code are 5,6,7,8 or 9.
A) The probability that the locker code begins with a prime number is what %.
Two of the digits are prime number: 5 and 7
Thus the probability that the locker code begins with a prime number is:
2/5 = 40%
B) The probability that the last digit of the locker code is an odd number is what %.
If the last digit is an odd number than the locker code is an odd number.
There are three odd numbers: 5,7,9
Thus the probability that the last digit is an odd number which will make the locker code an odd number is:
3/5 = 60% ....
