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Sagot :
Answer:
170 more girls than boys
Step-by-step explanation:
Let A and C stand for the numbers of Adults (A) and Children (C). Let B and G stand for the numbers of Boys(B) and Girls (G).
We learn that A = 38.
We also find that:
C = A + 360 [There were 360 more children than adults]
We can write that: B + G = C [the total children is the sum of B and G]
Then we are told that the ratio of the number of the boys to the number of girls was 2:7
B/G = 2/7 , or
2G = 7B
and we can write G = (7/2)B
We want to find (G-B) [ How many more girls than boys were at the zoo?]
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C = A + 360
C = 38 + 360
C = 398
==========
B + G = C
B + G = 398
B + (7/2)B = 398
(7/2)B = 398
B = (398)*(2/7)
B = 113.7 or 114 [Round to nearest whole boy, out of courtesy]
G = 398 - 114 = 284
There are (284 - 114) = 170 more girls than boys at the zoo.
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