Level 3
During her shopping trip, Samantha bought three different types of pens, X, Y and Z in the ratio of 4 : 2 : 5. She decided to sell them at the prices listed as shown.
Pen X: $1.20
Pen Y: $0.85
Pen Z : $0.60
Given that Samantha bought a total 451 pens, how much did Samantha collect from the sale of all the pens?
Level 2
Alina spent $1300 on a printer. Of the remaining salary, she spent 16 on a notebook. She had 25 of the original total left. How much was her salary?
Level 3
At the school's annual band concert, 40% of the students were from upper primary and the rest were from lower primary. The entrance fee to the concert for each upper primary student and each lower primary student was $8 and $6 respectively. The total entrance fees collected for all the tickets was $5440. How many students were at the concert?
