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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.

Since the total of the scores for each of them is 7, this is possible if they get scores of 1, 2 and 4 or 1, 3 and 3. If they get scores of 1, 2 and 4, then the only way this is possible is if each of them gets 1 in F, 2 in C and 4 in S as it is only for these scores in the respective attributes that there are 2 or more people. If they get scores of 1, 3 and 3 then each of them gets 1 in F and 3 in S and C each. In either case, Amda and Calla score 1 in F.

Answer: 1

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