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How many four digit numbers can be formed using the digits 5 8 and 9 with one pair of adjacent fives and no other repeated digits?
Updated: 8/21/2019
Wiki User
∙ 6y agoBest Answer
For every pair of 5s, the other two digits can be filled in 2 × 1 = 2 different ways.
There are 3 positions the pair of 5s can sit (first and second, second and third, or third and fourth digits)
→ there are 3 × 2 = 6 different possible numbers
(which are: 5589, 5598, 8559, 9558, 8955, 9855)
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∙ 6y agoThis answer is:
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