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2/6 of be by to 2/6 is to 24/72 ?

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 %.

8. is a technique that uses the images from several telescopes to produce a single image. a. reflection b. interferometry c. radiation d. refraction