Re: The ratio of boys to girls in a certain coed school is greater than 1.
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24 Jan 2023, 06:25
OE
The original ratio can be expressed in a proportion equation:
v/c=3/1
v=3c
After the departure of 180 violinists, you have a new proportion:
v-180/c=3/2
You now have two equations and two variables and can combine and solve.
You might also notice that when the 180 violinists depart, the ratio of violinists to cellists is cut in half. Therefore, 180 must have been half of the violinists.Originally, then, there must have been 360 violinists. Since there were 3 times as many violinists as cellists, there were 360/3 =120 cellists