Tuesday

September 30, 2014

September 30, 2014

Posted by **Kay** on Monday, November 12, 2012 at 9:56pm.

- Math -
**Kay**, Monday, November 12, 2012 at 10:34pmplease?

- Math -
**Reiny**, Monday, November 12, 2012 at 11:46pmnumber of cases with no repeating digits

= 9x8x7 = 504

number of cases where digits repeat

= 9x9x9 = 729

so prob(no repeating digits) = 504/729 = 56/81

all 3 digits repeat, could be 111 , 222, .. 999

or 9 of them

prob = 9/729 = 1/81

I am not clear what you mean by "exactly one repeated digit"

- Math -
**Kay**, Tuesday, November 13, 2012 at 12:11amone digit is repeated twice

**Answer this Question**

**Related Questions**

math - A locker combination has three nonzero digits, and digits cannot be ...

Math - A locker combination has three nonzero digits, and digits cannot be ...

Math - Mr. Digit wanted to assign a number to each student in his class. He ...

Math - A locker combination has three nonzero digits, and digits cannot be ...

Math - Using the 9 digits, 1, 2, 3, 4, 5, 6,7, 8 and 9 you can arrange four ...

math - Solve the mathematical puzzle. Determine the digits of F from these clues...

math-probability - A state lottery has a daily drawing to form a four-digit ...

4th grade - Mr. Digit wanted to assign a number to each student in his class. He...

MATH - Need Answer to the Following Please: Using the 9 digits, 1, 2, 3, 4, 5, ...

math - I am thinking of a two-digit number in which the sum of the digits is 9 ...