Bunuel wrote:
Emily has a box containing 15 blue contact lenses, 20 green contact lenses, 25 brown contact lenses, and 30 gray contact lenses. She has a 6-day vacation and wants to take 6 matching-colorpairs with her (for example, 6 pairs of blue lenses OR 2 pairs of green lenses, 3 pairs of gray lenses, and 1 pair of brown lenses OR 1 pair of blue lenses, 1 pair of green lenses, 2 pairs of brown lenses, and 2 pairs of gray lenses, and so on.). What is the least number of contact lenses that Emily must randomly select from the box to guarantee that her selections contain at least 6 pairs of contact lenses?
A. 12
B. 13
C. 14
D. 15
E.16
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If Emily selects one each from blue, green, brown and gray and again one each from them, we get 4 pairs of contact lenses with total 8 chances
Now Emily can again select one each, and we may not get any pair ....so total becomes 12
but the moment Emily select one each from any color, she will get 6 pairs..i.e if she selects blue and green she gets 6 pairs
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Statistics : Posted by PK1 • on 10 Jul 2024, 07:00 • Replies 61 • Views 825