In a deck of poker, take 36 cards of various colors from 1 to 9 * * *.

Suppose the first card is A and the second card is B.

Then, the two digits from left to right are 10a+b respectively.

The two digits from right to left are 10b+a respectively.

The sum of two numbers is11a+11b =11(a+b).

That is, the sum of two numbers is 1 1 times the sum of two playing cards.

The above is the general content, and the following is the extended content:

If we want to study the distribution of these two sums deeply, that is to calculate the probability of each sum.

From 1 1 to19,21~ 29. . . 9 1~99 are all possible situations of numbers.

It is troublesome to analyze the probability of each number and then summarize the probability of different sums.