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Summer Clouds moderators

24/07/2017 at 09:00
Answers
2
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In a bag there are 3 green apples, 5 yellow apples, 7 green pears and 2 yellow pears. Simon randomly is taking fruits out of the bag one by one. How many fruits must he take out in order to be certain that he has at least one apple and one pear of the same colour?




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  • ...
    Lan Hương Chanel 24/07/2017 at 16:39

    we see the number of apples is bigger than the number of pears ( 3 + 5 < 7 + 2 )

    The number of fruits he must gain momentum

    ( 7 + 2 ) + 1 = 10 ( fruits )

    So the answer is 10 fruit 

  • ...
    Lê Quốc Trần Anh Coordinator 24/07/2017 at 09:17

    To be certain, the problem must be solved by finding the largest number of fruits.

    Because the number of pears are larger than the number of apples \(\left(3+5< 7+2\right)\)

    => The fruits that he must take out is: \(\left(7+2\right)+1=10\left(fruits\right)\)

    So the answer is \(10fruits\)


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