A firm has 4 senior partners and 6 junior partners. How many different groups of 3 partners can be formed in which at least one member of the group is a senior partner. (2 groups are considered different if at least one group member is different)	Choose the correct choice from the following answers
A) 48  B) 100  C) 120  D) 288  E) 600
Total no of groups of 3 members (including junior and senior) = 10C3   Total no of groups of 3 members (only juniors) = 6C3   Total no of groups of 3 members (at least 1 senior) = 10C3 - 6C3 = 120 - 20= 
<gadget id="calculator">120 - 20</gadget>
<output>100</output>
100   ans:100
<result>B</result>
A firm has 4 senior partners and 6 junior partners. How many different groups of 3 partners can be formed in which at least one member of the group is a senior partner. (2 groups are considered different if at least one group member is different)