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A survey of 500500 farmers showed that of the​ farmers, 122122 grew only​ wheat, 107107 grew...

A survey of

500500

farmers showed that of the​ farmers,

122122

grew only​ wheat,

107107

grew only​ corn,

9292

grew only​ oats,

196196

grew​ wheat,

6161

grew wheat and​ corn,

4949

grew wheat and​ oats, and

182182

grew corn. Determine the number of farmers who ​a) grew at least one of the​ three, ​b) grew all​ three, ​c) did not grow any of the​ three, and ​d) grew exactly two of the three.

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