واجب الستات

[Ł ớ M ŷ]

عشـآن اريحكـ (=
(In how many ways can three boys and three girls sit in a row)
Since we assume that each person is unique, the total number of ordering is given
by 6! = 720

(In how many ways can 3 boys and 3 girls sit in a row if the boys and the girls are each to sit together)
We have 3! orderings of each group of the three boys and girls. Since we can put
these groups of boys and girls in 2! different ways (either the boys first or the girls first) we
have
(2!) · (3!) · (3!) = 2 · 6 · 6 = 72

وهكذآآ بقية الأسئلة ,, نفس اسئلة الكتآب ونفس الأرقآم ..!!
بس ما ينفع تعتمدي على الأجوبة بدون مآتحاولي تحلهآ بنفسكـ (=
الله يوفقـكـ ~