Asked by anon

Beginning with cars made in 1981, all vehicles must contain a 17-digit Vehicle Identification Number (VIN). The first 3 positions must be letters or numbers, position 4 and 5 must be letters, positions 6 and 7 must be numbers, position 8 can be a letter or a number, position 9 is a number, position 10 is a letter or a number, and positions 11 through 17 must be numbers. All numbers and letters can be repeated. How many different VIN codes can there be? Write your answer in scientific notation; round the first factor to the hundredths.

Would the answer be: 3.56x10^14? I got this answer by doing 17 nPr 17
Answered by Reiny
According to the condition you stated

36x36x36x26x26x10x10x36x10x36x10x10x10x10x10x10x10
= (36^5)(26^2)(10^10)
= 4.09 x 10^20
Answered by aaa
why did you multiply it 5, 2, and 10 times? like why is it 35^5, 26^2, and 10^10?
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