Posted by steph on Thursday, June 20, 2013 at 3:23pm.
What is the probability that an 8 digit numbers contains "97"?

probability  Steve, Thursday, June 20, 2013 at 3:55pm
if the first 2 digits are 97 then there are 10^6 ways of picking the other 6 digits.
Since the 97 can appear in 7 different places in an 8digit number, that means there are 7,000,000 ways to make an 8digit numbers with 97 in it.

probability  Steve, Thursday, June 20, 2013 at 6:10pm
so, that would be a probability of 7*10^6/9*10^7 = 7/90 = .0777
Answer This Question
Related Questions
 Math  Probability  what is the probability of getting two sets of 8 digit ...
 Counting and Probability  How many 3digit numbers have the units digit larger ...
 business math  What is the probability that a 8digit phone number contains at ...
 Probability  The serial number on a $10 bill contains eight nonzero digits. If...
 Probability  The serial number on a $10 bill contains eight nonzero digits. If...
 math  A bag contains ﬁfty slips (small pieces of paper) with the ...
 statistics  At a church bazzar they have a game of chance that consists of ...
 math  Numbers that are palindromes read the same forward and backward. For ...
 probability  please help! 1.) A random digit from 1 to 9 (inclusive) is chosen...
 Math  A spinner has numbers 116 on it. Probability of 6? 1/16 Probability not ...
More Related Questions