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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. the probability that the locker code begins with a prime number is %. the probability that the last digit of the locker code is an odd number is %.

During which era in earth's history were the first insects? mesozoic precambrian cenozoic paleozoic

Dry land planting can benefit the environment by reducing the need for tillagate