Set X consists of the integers from 10 to 15, inclusive, while set Y consists of the integers from 5 to 10, inclusive. How many distinct integers do belong to the both sets at the same time?
Choose the correct choice from the following.
A) 5 B) 8 C) 4 D) 1 E) 9
X= {10, 11, 12,13,14,15}   Y = {5,6, 7, 8, 9, 10}   Common elements = {10} = 1 element   Answer: Option 1.
<result>D</result>
Set X consists of the integers from 10 to 15, inclusive, while set Y consists of the integers from 5 to 10, inclusive. How many distinct integers do belong to the both sets at the same time?