Mathematics for IGCSE & O level - Ratio And Proportion (Section 5 - No. 21)
If 6 tickets cost $18, which statements are correct?
1 ticket costs $3.
5 tickets cost $15.
10 tickets cost $30.
15 tickets cost $45.
Explicació
cost/ticket = 18/6=3. 1 ticket is 3, and each other calculations are straight forward, 5*3=15, 10*3=30, 15*3=45