SOLUTION: Phil & phyllis are siblings. phyllis has twice as many brothers
as she has sisters. phil has the same number of brothers as
sisters. how many girls and how many boy
Algebra.Com
Question 38009: Phil & phyllis are siblings. phyllis has twice as many brothers
as she has sisters. phil has the same number of brothers as
sisters. how many girls and how many boys?''.
I can figure out the awnser in my head but i have no idea how to put it into a equation
Answer by psbhowmick(878) (Show Source): You can put this solution on YOUR website!
Noun "phyllis" has been qualified with verb "she". So phyllis is girl.
Let the number of her sisters = x, then number of her brothers = 2x.
So total brothers and sisters of phyllis (including herself) = 2x + x + 1 = 3x + 1.
Note: It has not been mentioned whether phil is a girl or a boy.
First case: Let us assume that phil is boy.
Then the number of his brothers = 2x - 1 (as he himself is not included)
and the number of his sisters = x + 1 (x = no. of sisters of phyllis who herself is a girl)
As no. of sisters = no. of brothers, so 2x - 1 = x + 1 or x = 2.
Second case: Let us assume that phil is a girl.
Then the number of her brothers = 2x
and the number of her sisters = x (x = no. of sisters of phyllis who herself is a girl)
As no. of sisters = no. of brothers, so 2x = x or 1 = 2.
This is not possible.
So phil cannot be a girl.
Thus phyllis has 2 sisters and 4 brothers, making a total of 3 girls and 4 boys.
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