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Students used to have four-digit ID codes now ID codes consist of five digits and 1 letter how many more ID codes are there now than there used to be?
Wiki User
∙ 12y ago
For a four-digit ID code, you would have 10x10x10x10, so 10000 different codes. With a five-digit and one letter ID code, you have 10x10x10x10x10x26 or 2,600,000 different codes. So there are 2,600,000-10,000 more, or 2,590,000 more codes.
Wiki User
∙ 12y ago
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What letters of the alphabet consist of only a line segment perpendicular to a pair of parallel line segments?
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There are 26 different letters that can be chosen for each letter. There are 10 different numbers that can be chosen for each number. Since each of the numbers/digits that can be chosen for each of the six "spots" are independent events, we can multiply these combinations using the multiplicative rule of probability.combinations = (# of different digits) * (# of different digits) * (# of different digits) * (# of different letters) * (# of different letters) * (# of different letters) = 10 * 10 * 10 * 26 * 26 * 26 = 103 * 263 = 1000 * 17576 = 17,576,000 different combinations.
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