avatar +29 

In a contest, four fruits (an apple, a banana, an orange, and a pear) have been placed in four closed boxes (one fruit per box). People may guess which fruit is in which box. 123 people participate in the contest. When the boxes are opened, it turns out that 43 people have guessed none of the fruits correctly, 39 people have guessed one fruit correctly, and 31 people have guessed two fruits correctly.

The Question: How many people have guessed three fruits correctly, and how many people have guessed four fruits correctly?

Sardonyx97 Apr 21, 2017

1+0 Answers

avatar +73845 

123  - 43  - 39 - 31   = 10  people  are left


All 10  must have guessed  4 fruits correctly, because if they guessed 3 fruits correctly, then, by default, the last fruit must also also have been guessed correctly...!!!




cool cool cool

CPhill Apr 21, 2017

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