Asocial security number consists of nine digits in a particular order, and repetition of digits is allowed. after seeing the last four digits printed on a receipt, if you randomly select the other digits, what is the probability of getting the correct social security number of the person who was given the receipt? what is the formula?

You have to guess the first 5 digits.

You can calcualte the number of possible numbers that exist with 5 digits.

The first digit cannot be 0, it can be any from 1 to 9, so those are 9 diferent digits.

For the second, third, fourth and fifth digits there are 10 diferent posibilities for each: 0 through 9.

Then, there are 9*10*10*10*10 = 90,000 different possible social security numbers once the last four digits are known.

And the probability to get the correct social security number of the person is 1 /90,000 = 0,000011.

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .