amanvermagmat wrote:
Sam has a big drawer full of exactly 59 packets, each containing a marker which is either black or blue or red in colour. All 59 packets are sealed and are completely identical from outside. It is not possible to know which colour marker is inside unless the packet is fully opened. Out of 59, 23 packets contain a black marker each. How many packets contain a blue marker?
(1) If Sam withdraws packets without looking at their contents, he needs to draw minimum 49 packets to ensure that he has at least one marker of each colour out of red, blue, black.
(2) Drawer has less packets containing red markers than those containing blue markers.
Total - 59 packets
Black - 23 packets
so R + Blue = 59-23=36
Blue = ?
(1) If Sam withdraws packets without looking at their contents, he needs to draw minimum 49 packets to ensure that he has at least one marker of each colour out of red, blue, black.
49 packets means 49 = Max of two + only 1 of minimum..
so biggest 2 = 49-1=48
Black = 23, other larger qty = 48-23=25 and the least = 59-48=11
so Blue could be 25 or 11
insuff
(2) Drawer has less packets containing red markers than those containing blue markers.
R < Blue
insuff
combined
R<Blue ..
R and B could be 25 or 11
so Red = 11 and Blue = 25
suff
C
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