Last year, the 7th grade enrollment at a middle school was 150 students. This year, the enrollment increased by 120%. How many 7th grade students are there in this middle school this year? 270

There will be 330 7th grade students in this middle school this year.

Step-by-step explanation:

Last year enrollment = 150 students

As the enrollment increased by 120%.

i.e.

Number of Percentage increase = 120% × 150 = 120/100 × 150

                                                       = 1.2 × 150

                                                        = 180

Thus,

Total students this year = No. of Percentage increase + Last year students

                                       = 180+150

                                        = 330 students

Therefore, there will be 330 7th grade students in this middle school this year.

well if he bought them at 5 cedis each sold them at 7 cedis each then he would make a profit of 2 cedis of each book. if in total he made 150 cedis profit that means he sold 75 books. he lost 12 books at the start so that means he originally bought a total of 82 books.

step-by-step explanation: