Solution: How many ways are there to select 3 juniors and 4 seniors from chorus?

Solution: Find the two values at which must lie at least 75% of the data

Solution: Find the average of the given quantities

Solution: What is the number of calculator to be produced?

Solution: What is (7+8i)/(4-2i)?

Solution: What is the sum of the first 50 terms of the series 10+85+160+325?

Solution: What is the sum of the series 1+1/3+1/9?

Solution: Find the 17th term of a geometric progression

Solution: How many ways can you arrange the paintings in the given slot?

Solution: What is the median of the sequence?