In how many ways can a committee of 4 people comprising at least 3 boys be formed using a group of 4 boys and 6 girls?	Select the correct option.
A) 67 B) 64 C) 65 D) 66 E) None of these
There are 2 options: the selected groups have no girls or one girls.   -First case: 1 girl + 3 boys: 6C1 * 5C3 = 6*10= 
<gadget id="calculator">6*10</gadget>
<output>60</output>
60   -Second case: 4 boys: 5C4= 5   So there are 60 + 5 = 64 ways in total.   64
<result>B</result>
In how many ways can a committee of 4 people comprising at least 3 boys be formed using a group of 4 boys and 6 girls?