Out of 70 countries with below average per capita income, 53% have a low heart- disease mortality rate. Determine the number of countries with below average per

capita income that have a low heart-disease mortality rate. Round to the nearest
whole number if necessary.

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.

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