How many people have guessed three fruits correctly, and how many people have guessed four fruits correctly? 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.



If participants are playing partly then, 43 have  guessed none correctly then it means 123-43 have guessed all fruits correctly. if 39 have guessed  1 fruit wrong then 123-39 have guessed it correctly.this may be possible....

and secondly if the boxes were closed then how could the fruits be placed in them??????
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