The idea that sedimentary rocks are deposited in horizontal layers unless disturbed by forces within the earth can best be explained by which of Steno's principles?

How can you find the conditional probability of a given b as the fraction of b’s outcomes that also belong to a, and interpret the answer in terms of the model? i just need a good explanation

Which of the following is a function? a.) {(-2, -4/5), (-1,-,,-1)} b.) {(-2,,1/,3/,1)} c.) {(-22)} d.) {(-21)}

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?