A building has 20 floors above the ground floor. Four people walk into this building on the ground floor, on their way to some floor above the ground.

When they reach the elevator, each person only presses the button of the floor they are going to.

What is the probability that 4 buttons for consecutive floors are pressed?

1/24

Step-by-step explanation:

using Permutations and Combinations

add an image

step-by-step explanation:

0.0076, if you meant 4.125 divided by 0.03125 it would be 132

step-by-step explanation:

first you have to move the decimal in 0.03125 over until its behind the 5 which is 5 places over. now the number is 3125

then you have to move the decimal in 4.125, 5 places over. now the number is 4,112,500.

now you divide like you would normally would and get 0.0076