How do you calculate probabilitty

1. A tank has 25 gallons of chemicals in it. Chemicals were added to the tank at a rate of 7 gallons per second.

Cheyenne needs to cut a piece of paper so that she has exactly 1/3 of it. If the length of the paper is 11 inches, how long will be the piece that she cuts? 3 and 1/3 2 and 1/3 3 and 2/3 2 and 2/3

Humaid can shovel the driveway in 3 hours, and Humaid can shovel the driveway in 2 hours. How long will it take them working together?

Faithe, Sion and Marco are partners in a fancy bakery. If Faithe gets 1/4 of the income, Sion gets 1/3 and altogether, they earn $480,000, how much does Marco get

Whats the difference between range and interquartile range?

Jack took 4 tests. on two tests jack received a score of 86, on one he received a score of 81, and on one he received a score of 79. if jack wants an average of 83, what score will he need to receive on his fifth test

a 27 1/2 mile stretch of a road needs repaving a company bid on the repaving project saying they could repave 2 1/4 miles of road per how many weeks will the company take to repave the stretch a 12 1/3 b 12 2/9 c 15 1/2 d 13 1/2

What is p divided by 6

A store is having a sale to celebrate President's Day. Every item in the store is advertised as 1/5 off the original price. If an item is marked with a sale price of $140, what was its original price? Show your work

Ms. Jones's class has 26 students and they count by the same number. Each student says only one munber the last student to count says 1040 by what number are they counting