lifeforhuskar wrote:
first group can be created in 10M*8F =80 ways
second group can be created in remaining 9M*7F=63 ways
so total no. of ways 80*63=5040
but there will be times when the choices in first group will be similar to choices in second group so divide it by 2!
hence 2520
IMO D
How there will be times when both the groups will have similar choices?
Aren't we taking care of that when we consider 10 and 8 for first group and 9 and 7 for second?
Posted from my mobile device
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