How many different ways can people be divided into
groups of two people each.
The given information is:
Number of people
Number of teams
Number of people in each team
Pick first people from
people,
Total no. of ways of choosing is:
Pick first people from
people,
Total no. of ways of choosing is:
Pick first people from
people,
Total no. of ways of choosing is:
Pick first people from
people,
Total no. of ways of choosing is:
Pick last people from
people and the number of ways this can be done is
.
Since the five groups are similar, there is no differentiation between them. Therefore, we need to divide it with .
The total numbers of ways:
Study 40% syllabus and score up to 100% marks in JEE