A double bar graph shows marks of two students in 4 subjects: Ravi=(80,60,90,70) and Sita=(75,80,80,85). In…

A double bar graph shows marks of two students in 4 subjects: Ravi=(80,60,90,70) and Sita=(75,80,80,85). In which subject is Sita's lead over Ravi the largest?
  1. Subject 1
  2. Subject 2
  3. Subject 3
  4. Subject 4

Solution

Differences (Sita $-$ Ravi): subj 1: $-5$; subj 2: $+20$; subj 3: $-10$; subj 4: $+15$. The largest positive difference (Sita's lead) is $+20$ in subject 2.

Asked in: IMO

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