Sudha wants to choose any 9 stamps from a set of 11 different stamps. How many different selections can she make?

Amy and Adam are making boxes of truffles to give out as wedding favours. They have an unlimited supply of 5 different types of truffles. If each box holds 2 truffles of different types, how many different boxes can they make?

A train is going from cambridge to london stops at nine intermediate stations. Six persons enter the train during the journey with six different tickets. How many different sets of tickets they have had?

The English alphabet has 5 vowels and 21 consonants. How many words with two different vowels and 2 different consonants can be formed from the alphabet?

The English alphabet has 5 vowels and 21 consonants. How many words with two different vowels and 2 different consonants can be formed from the alphabet?

The English alphabet has 5 vowels and 21 consonants. How many words with 2 different vowels and 2 different consonants can be formed from the alphabet?

A triglyceride can have how many different acyl groups?

How many 9- digits numbers of different digits can be formed?

George is going on vacation and wishes to take along 2 books to read. If he has 5 different books to choose from, how many different combinations of 2 books can he bring ?

How many different teams of 7 players can be chosen from 10 players?

A committee of 4 is to be selected from a group of 7 women and 4 men . How many different committees of 2 men and 2 women can be formed ?