AC Lim's answer to Judso's Primary 6 Maths Data Analysis Singapore question.
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Hope this helps
Date Posted:
2 years ago
Hi, May I know why do we take the diff of $0.25 to divide by 21 days and not $1.75?
Aisha have $21 more
When Mimi save $1.75
Aisha save $1.50
Mimi is 21-0.25 = 20.75 closer to Aisha...
2nd day
Mimi save $1.75
Aisha save $1.50
Mimi is 20.75-0.25 = 20.50 closer to Aisha...
Hence, everyday is $0.25 closer...
Total = 21÷0.25
When Mimi save $1.75
Aisha save $1.50
Mimi is 21-0.25 = 20.75 closer to Aisha...
2nd day
Mimi save $1.75
Aisha save $1.50
Mimi is 20.75-0.25 = 20.50 closer to Aisha...
Hence, everyday is $0.25 closer...
Total = 21÷0.25
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