The committee of student union of school consists of 16 males and 18 females.They will organize Christmas programmes this year and one of the programmes will be a singing performance by a committee member.
This programme is finally adjusted by inviting a teacher of school to sing with a committee member of student union.There are 36 teachers.
Jewellery box:3 different rings,5 different bracelets and 4 different necklaces
(a)if a piece of jewellery is selected from jewellery box
(b)if a piece of each type of jewellery is selected from jewellery box