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?

Anonymous

∙ 7y ago

Updated: 8/21/2019

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)

Wiki User

∙ 7y ago

What else can I help you with?

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