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SHUBH · 27-05-06, 08:29 PM

4, 2*x*y/(x+y) 2*40*25/(40+25)

5. 4 brothers and 3sisters.

brothersb1-> s1 s2 s3

b2-> s1 s2 s3

b3-> s1 s2 s3

b4-> s1 s2 s3

b1 has 3 brothers so3 sisters

s1 has two sisters so number of brothers is 4i.e. twice.

27-05-06, 08:29 PM	#4 (permalink)
SHUBH Junior Member Join Date: May 2006 Location: Posts: 15 Thanks: 0 Thanked 0 Times in 0 Posts Thanks: 0 Thanked 0 Times in 0 Posts Rep Power: 3	4, 2xy/(x+y) 24025/(40+25) 5. 4 brothers and 3sisters. brothersb1-> s1 s2 s3 b2-> s1 s2 s3 b3-> s1 s2 s3 b4-> s1 s2 s3 b1 has 3 brothers so3 sisters s1 has two sisters so number of brothers is 4i.e. twice.