Average weight of 20 students of a class is 30 kg. When the weight of teacher is included, the average weight of the class including the teacher is increased by 1 kg. What is the weight of the teacher? (Calculator is allowed)
Read on the optimal timings to sit for the SAT that will give you a competitive edge. With the SAT only being offered a few times every year, it is critical to find the right time to take your exam.