Ok, the problem says:
a Middle school has 125 6th graders, 150 7th graders, and 100 8th graders. Which statement is NOT true?
a. the ratio of 6th graders to 7th graders is 5 to 6.
b. the ratio of 8th graders to 7th graders is 3:2.
c. the ratio of 6th graders to students in all three grades is 1:3.
d. the ratio of 8th graders to students in all 3 grades is 4 to 15.
b. 8th:7th = 2:3
Thank you helper so much!!!!:)
To determine which statement is NOT true, we need to calculate the ratios for each statement and compare them to the given information.
a. The ratio of 6th graders to 7th graders is given as 5 to 6. We can calculate this ratio by dividing the number of 6th graders (125) by the number of 7th graders (150), which gives us 125/150 = 5/6. This means that statement a is true.
b. The ratio of 8th graders to 7th graders is given as 3 to 2. We can calculate this ratio by dividing the number of 8th graders (100) by the number of 7th graders (150), which gives us 100/150 = 2/3. This means that statement b is false.
c. The ratio of 6th graders to students in all three grades is given as 1 to 3. We can calculate this ratio by dividing the number of 6th graders (125) by the total number of students in all three grades (125+150+100 = 375), which gives us 125/375 = 1/3. This means that statement c is true.
d. The ratio of 8th graders to students in all three grades is given as 4 to 15. We can calculate this ratio by dividing the number of 8th graders (100) by the total number of students in all three grades (125+150+100 = 375), which gives us 100/375 = 4/15. This means that statement d is true.
Therefore, the statement that is NOT true is statement b, which says that the ratio of 8th graders to 7th graders is 3 to 2.
Are you supposed to solve these problems like this?
Cross multiply and solve for x.
a.
125/150 = x/6
150x = 750
x = 750/150
x = 5