M is a girl and has the same number of brothers as sisters. N is a boy and has twice as many sisters as brothers. M and N are the children of Q. How many children does Q have?
M is a girl and has the same number of brothers as sisters. N is a boy and has twice as many sisters as brothers. M and N are the children of Q. How many children does Q have?
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ক
2
-
খ
3
-
গ
5
-
ঘ
7
-
ঙ
8
Given: Let boys = B and girls= G
Therefore, Q has = G + B children
M is a girl and has the same number of brothers as sisters.
Therefore, excluding M, G - 1 = B ........(1)
N is a boy and has twice as many sisters as brothers.
Therefore, excluding N, 2(B -1) = G,
2B - 2 = G .........(2)
By equation (1) and (2) B = 3 and G = 4 Hence, the number of children Q have is 7.
Q have three children, M, N and another girl.
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