A class of 16 pupils and their teacher are queuing outside a cinema.
Question Topics: Counting arrangements
A group of nine pupils (five boys and…
A group of nine pupils (five boys and four girls) are lining up for a photograph, with all the girls
A class of 16 pupils and their teacher are queuing outside a cinema.
A group of nine pupils (five boys and four girls) are lining up for a photograph, with all the girls