A total of 108 people attended a charity event. The entrance to the event cost L 120. There was a discount of 20% for the elderly (which means that the ticket for them had a cost of L 96). If the total raised was L 12,216, how many seniors attended the event?

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of