Homework Help: maths

Posted by vickel on Monday, September 3, 2007 at 2:43am.

Mr. George has some children. Each of his sons has the same number of brothers and sisters. Each of his daughters has twice as many brothers as sisters. How many children does Mr. George have?

maths - drwls, Monday, September 3, 2007 at 5:48am
Let x be the number of sons and y be the number of daughters.
x-1 = y = (The number of brothers each son has)
y-1 = x/2 = (The number of sisters each daughter has)
y-1 = (1/2) (y+1)
y/2 = 3/2
y = 3
x = 4
Total number of children = x+y = 7
maths - bgd, Monday, October 29, 2007 at 8:57am
bdg

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