In a group of 6 boys and 4 girls are to be selected. In how many different ways can they be selected such that at least one boy should be there ?  Pick one
A) 209 B) 200 C) 210 D) 225 E) 221
No of boys = 6   No of girls = 4   Therefore,   No of ways at least 1 boy can be selected = 6C4 * 4C0 + 6C3* 4C1 + 6C2*4C2 + 6C1 * 4C3   = 15 + 80 +90 + 24= 
<gadget id="calculator">15 + 80 +90 + 24</gadget>
<output>209</output>
209   209ns - 209
<result>A</result>
In a group of 6 boys and 4 girls are to be selected. In how many different ways can they be selected such that at least one boy should be there ?