A math class has 4 girls and 4 boys in the seventh grade and 7 girls and 3 boys in the eighth grade. The teacher randomly selects a seventh grade and an eighth grader from the class for a competition. What is the probability that the students she selects are both girls?

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

How to solve a simultaneous equation involved with fractions?

Aschool allots ? 1500 to spend on a trip to the theatre. theatre tickets have a regular cost of ? 55 each and are on offer for 1 5 off. a train ticket for the day will cost ? 12 each. if 2 teachers and the maximum number of students attend, how much money will the school have left over?