The number of dishes Sandrine washed was 10 more than the number of bananas Charles cooked. Also, the number of bananas Charles cooked was 3 times the number of pears he picked. If Charles picked 50 pears, how many dishes did Sandrine wash?
Step-by-step reasoning process below:
160
If the bananas Charles cooked were 3 times the number of pears he picked, then Charles cooked 3 * 50 = 150 bananas.

Since all the dishes that Sandrine washed were 10 more than the number of bananas Charles cooked, Sandrine washed 150 + 10 = 160 dishes.

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The final answer: 160