Atest consists of 20 problems and students are told to answer any 15 of these questions. in how many different ways can they choose the 15 questions?

a. 15,504

b. 20,145

c. 23,670

d. 25,890

fahrenheit

step-by-step explanation:

fahrenheit is more precise than celsius. the ambient temperature on most of the inhabited world ranges from -20 degrees fahrenheit to 110 degrees fahrenheit—a 130-degree range. on the celsius scale, that range is from -28.8 degrees to 43.3 degrees—a 72.1-degree range. this means that you can get a more exact measurement of the air temperature using fahrenheit because it uses almost twice the scale.