Question 1
Question: Find n.


Answer: i)







ii)





\n = 81
Question 2
Question: A lady wants to select one cotton saree and one polyster saree from a collection of 8 cotton sarees and 11 polyster sarees. In how many ways can the lady choose the two sarees?
Answer: Here, there are two events E1 and E2.
E1 = Selection of one cotton saree from 8 cotton sarees.
E2 = Selection of one polyster saree from 11 polyster sarees.
E1 = 8 ways E2 = 11 ways

Question 3
Question: 
Answer: i)

ii)

iii)

Question 4
Question: When n = 5 and r = 2, find the values of

Answer: i)

ii)

Question 5
Question: 
Answer: 







Question 6
Question: Convert the following into factorials:
i) 5.6.7.8.9.10 ii) 4.6.8.10.12
Answer: i)

ii)

Question 7
Question: 
Answer: 



Question 8
Question: 
Answer: 



Question 9
Question: 
Answer: 




Question 10
Question: Find n if P(n,4) = 20P(n,2)
Answer: 



