The ratio of 7th to 8th graders in a play is 2:3. There are 30 students in the play. How many are 8th graders?
S/30 x2/3=3s/3=60/3= 20 8th graders. Can someone check this for me if wrong tell were.
3 answers
this is wrong, because the ratio of 7th to 8th is 2:3. this suggests that for every 2 7th graders, there are 3 8th graders. basically, you did the match right, you just flipped the ratios
the math* NOT MATCH
number of 7th graders ---- 2x
number of 8th graders ---- 3x
(note 2x : 3x = 2:3)
2x + 3x = 30
x = 6
so we have 12 seven graders and 18 eight graders
check: 12+18 = 30
12 : 18 = 2:3
number of 8th graders ---- 3x
(note 2x : 3x = 2:3)
2x + 3x = 30
x = 6
so we have 12 seven graders and 18 eight graders
check: 12+18 = 30
12 : 18 = 2:3