In Orange County one tenth of the people are gathering mushrooms and one seventh of the people are collecting apples. What can be the number of people in Orange County?
Choose the correct option:  A) 60.  B) 42.  C) 85.  D) 70.  E) 252.
The number must be an integer and multiple of both 10 and 7.   Only option 70. fulfill this condition and hence is the answer.
<result>D</result>
In Orange County one tenth of the people are gathering mushrooms and one seventh of the people are collecting apples. What can be the number of people in Orange County?