mdlane04 mdlane04
  • 31-03-2017
  • Mathematics
contestada

Erica gets a new credit card. What is the probability that the last four digits are all 5s?

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suzy777
suzy777 suzy777
  • 31-03-2017
5/20 braces you do 5•4=20 and it's out of 5 so 5/20
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IGotChillsTheyreX
IGotChillsTheyreX IGotChillsTheyreX
  • 31-03-2017
Your answer is 1/10,000
There are 10 possible chances for each digit. The chances of getting a 5 is 1/10 for each. 1/10 four times (1/10x1/10x1/10x1/10) = 1/10,000

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