Question

Your mom suggested ten different choices for you to eat for lunch over the next week at school. How many different ways can you choose your school lunch? A. 120 B. 252 C. 2,502 D. 30,240

Answer 1

Answer:

B. 252

Step-by-step explanation:

To find the answer, you have to use the formula to calculate the number of combinations as in this case, the order in which the objects are selected doesn't matter:

nCr=n!/r!(n-r)!

n= number of sample points: 10

r= number of sample points in each combination: 5

10C5= 10!/5!(10-5)!

10C5= 10!/5!*5!

10C5= 252

According to this, the answer is that you have 252 different ways to choose your school lunch.