Lunch time

In a cafeteria, 3/10 of the students are eating salads, and 3/5 are eating sandwiches. There are 30 students in the cafeteria. How many students are eating lunches other than salads or sandwiches?

Correct answer:

x =  3

Step-by-step explanation:

n=30 S=103 n=103 30=9 A=53 n=53 30=18  x=nSA=30918

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