Okay the first time nobody came, but please come now. I want steps. This must be written in scientific notation. Thanks! Do 17 a
nd 18 or 19 and 20. Your choice! Just 2 of them. One division and multiplication.
1 answer:
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Answer:
34,220
Step-by-step explanation:
Because order doesn't matter, but the numbers can't be repeated, we need to find the number of combinations where 3 individual numbers can be chosen out of 60 possible numbers using the binomial coefficient:
Thus, Elias can make 34,220 unique 3-number codes given 60 different numbers.