No, 10 5's because there is no way to match 4 colors without matching all five..



>>>Hi everybody,
>>>
>>>I've read a new puzzle and I can not figure this out, though my former colleague did it in seconds.
>>>
>>>Here it is:
>>>
>>>30 blind people participated in an experiment. In a closed room there were 5 drawers in 5 different colors. They were given 5 paper slips representing these colors and they have to match the colors.
>>>It's known that all of them match at least one color.
>>>10 matched only 1 color.
>>>6 matched only 2.
>>>4 matched only 3.
>>>
>>>The question is: how many matched exactly 4 colors and how many matched exactly 5.
>>
>>If 20 out of 30 matched less than four colors, then the remaining ten matched them all. Because you can't match only four - the fifth one has only place to go then.
>>
>>And the "all of them match at least one color" is there just to make sure there's nobody in the zero category.
>
>So the correct answer is... the same number for both 4s and 5s?