TRAIN YOUR BRAIN 1

[franziska39]

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?

[Teehee]

then I'll try first

Mehr ->

there are just 10 people left so I think that perhaps 9 people have guessed three fruits correctly and just 1 person had guessed all fruits correctly...

[griphus]

Mehr ->

Think! Of course if someone guesses 3 fruits right he has all of them right. The fourth one can only be correct. In other words 10 persons guessed four fruits right.

[Teehee]

Oh yeah you're right

[franziska39]

EXACTLY, Griphus. Well done !!!