No, it's not right.
Use a proportion.
3/5 = x/30
5x = 90
x = 18 eighth graders
How do you work this problem is like this
2/3 x30/1=60/2=20 is this right
Use a proportion.
3/5 = x/30
5x = 90
x = 18 eighth graders
doesn't lead to unnecessary work on the part of tutors.
https://www.jiskha.com/questions/1784954/The-ratio-of-7th-to-8th-graders-in-a-play-is-2-3-There-are-30-students-in-the-play
Given that the ratio of 7th to 8th graders in the play is 2:3, we can set up a proportion to find the number of 8th graders.
Let's assume that the number of 7th graders is 2x, and the number of 8th graders is 3x. Since the total number of students in the play is 30, we can write the equation:
2x + 3x = 30
Combining like terms, we have:
5x = 30
Next, divide both sides of the equation by 5 to isolate x:
x = 30/5
x = 6
Now, plug this value of x back into the expressions for the number of 7th and 8th graders:
Number of 8th graders = 3x = 3 * 6 = 18
Therefore, there are 18 8th graders in the play.