Answer:

Explanation:
GIVEN: There are pencils in the box:
red ones,
blue,
green,
yellow. Let us take, with eyes closed, some number of pencils from the box.
TO FIND: What is the least number of pencils we have to take in order to ensure that we get at least
pencils of the same color.
SOLUTION:
Total number of red pencils

Total number of blue pencils

Total number of green pencils

Total number of yellow pencils

if we pick
pencil, there can be
pencil of each color
Least number of pencils we have to take in order to ensure that we get at least
pencils of the same color is
.