There are 3 identical pens and 5 identical books. In how many ways can a person select at least one object from this set?
Choose one
A) 23 B) 25 C) 31 D) 15 E) 45
total ways = 6*4=24..   But we are looking for ATLEAST 1, so subtract 1 way when both are 0..   ans 24-1=23..   23nswer is 23
<result>A</result>
There are 3 identical pens and 5 identical books. In how many ways can a person select at least one object from this set?