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STATISTICS DOUBT!!! PLZ REPLY ASAP!!!

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I Jimmy I:
Ermm guys! I got another doubt.....

Question 6(i) of MJ 2010, 2nd varient.

Plz reply ASAP

Ghost Of Highbury:
x = 0,1,2

0 -> all ducks -> 5/7*4/6*3/5*2/4 = 1/7


1-> any place out of the 4 can be a geese - > 4C1 * 5/7*4/6*3/5*2/4= 4/7

2-> 4C2*5/7*4/6*2/5*1/4 = 2/7

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