Discussion

Explanation:

Let us tabulate the information given in the bar graph depicting the number of countries against the happiness index score for each attribute. 

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There are 2 possibilities for Amda and Calla’s scores. Since each of them has identical scores for each of the 3 attributes, we need a pair of identical scores for each of the 3 attributes.

If Zooma had scores of 6, 6 and 5 in C, S and F respectively, then Benga and Delma would have their highest scores in S and F (not nesessarily in that order).

Further, the country which scored the highest is S could score 5 in F and the country which scored the highest in F could score 5 in S.

Now since both Benga and Delma have equal scores and the equal score has to be in the category of C for both of them, the only possibility for this is when each of them scores 3 in C (as for no score higher than 3 do we have a pair of identical scores for C). So the maximum possible score when Benga and Delma have equal scores is 7 + 5 + 3 = 15

If Zooma gets a score of 7 in F, 6 in S and 4 in C, then one amongst Benga and Delma will get a score of 7 in S and the other a score of 6 in C.

The country with a score of 7 in S could score 5 in F. However since Zooma has scored 4 in C, the country with a score of 7 in S and 5 in F can only have a score of 3 in C.

This gives a total of 15. So the country with a score of 6 in C can have a score of 5 and 4 in F and S (though not essentially in that order). So in this case too the maximum possible score is 15.

Hence, option (b).

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