Question: This question concerns binary strings of length six. These binary strings can be divided up into four types depending on their first and last bits.

This question concerns binary strings of length six. These binary strings can be divided up into four
types depending on their first and last bits. Thus the types are: 0XXXX0,0XXXX1,1XXXX0,
1XXXX1.
How many binary strings of length six must you select before you are sure to have at least 5 that
are of the same type? (Assume that when you select bit strings you always select different ones
from the ones you have already selected.)

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