According to the Pigeonhole Principle, it states that given that several X commodities are placed into Y containers, and the number of X commodities is greater than the number of Y containers, then there will be a minimum of one Y container having more than one X commodities.
Hence, in this case, since the month is 12 in numbers, then to have at least two people in the group whose birthdays fall in the same month, the group must be at least 13 people.
<h2><u>Medical imaging equipment are manufactured using technology from the semiconductor industry, including CMOS integrated circuit chips, power semiconductor devices, sensors such as image sensors (particularly CMOS sensors) and biosensors</u></h2>
