The line graph shows the litres of oil sold by a shop on six days, D1 to D6.
If 20% of the sale of D1 is transferred to D2 and 25% of the sale of D6 is transferred to D4, then what is the ratio of the sale on D2 to the sale on D4?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 310 : 319
A transferred amount is added to the day that receives it, so D2 and D4 each grow by the given share of the other day.
20% of D1 \(=0.2\times5000=1000\); new D2 \(=5200+1000=6200\)
25% of D6 \(=0.25\times5040=1260\); new D4 \(=5120+1260=6380\)
\(6200:6380\); dividing both by 20 gives \(310:319\)