120 students went to the school holiday dance , 3/5 of the students were 7th graders and 1/6 of the students were 8th graders the rest were 6th graders. How many students were 6th graders


I really need help I tried but didn't get the right anewer

120 students went to the school holiday dance 35 of the students were 7th graders and 16 of the students were 8th graders the rest were 6th graders How many stu class=

Respuesta :

Youre answer is 3/10 or 36 were 6th graders. In order to get  your answer first you need to add the two fractions. 3/5+1/6 ofc you need to make the bottom the same number so you convert them to 18/30 and 5/30 which equals 23/30 you simplify it and you should get 7/10. Now, if 7/10 of the students are 7and 8th graders, that means 3/10 of them are 6th graders. Then you figure out what  is 1/10 of 120 which is 12 ans mulitiply  by 3 which is 36