A student must answer 7 out of 10 questions on an examination. If at least 3 of the first 5 questions must be answered, how many possible combinations of 7 questions are available to the student?
.	Choose the correct option:
A) 50 B) 80 C) 110 D) 220 E) 360
1) preferred one   as there is ONLY one possiblity of choosing 7 out of 10, while choosing less than 3 in first five   choose 2 in first 5 and all 5 from later half..   ways = 5C2 = 10..   total ways = 101103 = 120   ans = 120-10= 
<gadget id="calculator">120-10</gadget>
<output>110</output>
110   ANSWER:110
<result>C</result>
A student must answer 7 out of 10 questions on an examination. If at least 3 of the first 5 questions must be answered, how many possible combinations of 7 questions are available to the student?
.