In a museum

There are 250 people in a museum
2/5 of the 250 people are girls.
3/10 out of the 250 people are boys.
The rest of the 250 people are adults.
Find the number of adults at the museum.

Correct answer:

a =  75

Step-by-step explanation:

n=250 g=52 n=52 250=52 250=5500=100 b=103 n=103 250=103 250=10750=75  b+g+a=n=250  a=nbg=25075100=75



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