# PERMUTATIONS AND COMBINATIONS

Permutations And Combinations Fully solved questions with complete explanation for written test, interview, competitive exams and entrance test. This section is very useful for those who are preparing for competitive exams such as Written test of IT companies,Bank Exams, CAT Exams, GATE Exams, Railway Exams, SSC, UPSC, Defence and many more.

Q. In how many ways can 4 ladies and 4 men form two mixed doubles teams for a tennis match?

• A) 72
• B) 108
• C) 36
• D) 84
Q. In a staircase there are 4 Steps.A person can jump one step,2 steps,3 steps or all 4 steps.In how many ways can be reach the top?

• A) 2
• B) 4
• C) 6
• D) 7
Q. The first 5  odd natural numbers are written in every possible order.How many numbers can be formed if no repetition is allowed and what is their sum?

• A) 5!,6666600
• B) 51,6666
• C) 51,55555
• D) None of these
Q. Oranges can be packed in sets of 10 oranges in box type A or 25 oranges in box type B. A carton comprising of 1000 oranges of type a and b is packed. How many different combinations are possible in the number of type A and type B boxes while organizing the oranges?

• A)  21
• B)  20
• C) 19
• D) 18
Today's Challenging Question
Q. Ajay & Bimal can do a price of work in 10 days, Bimal & Chetan can do in 15 days and Chetan and Ajay in 20 days. They work together for 6 days and then Ajay leaves and now Bimal & Chetan work together for 4 more days. If Bimal leaves, how long will Chetan take to finish the work?
A) 12 days
B) 10 days
C) 16 days
D) none
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