1- For the binomial expansion of (x+y)¹⁰, the value ofkin the term 210x⁶y^k is

a. 6 c. 5

b. 4 d. 7

2- For the binomial expansion of (x+y)¹⁰, the value ofkin the term 45x^ky⁸is

a. 2 c. 3

b. 4 d. 1

3- What is the value of the constant term in the [ 4+ 1/x ]^4 expansion of ?

a. 4 c. 64

b. 16 d. 256

4- How many different combination of trees could you buy if your local garden centre has only four cedar trees and three apple trees in stock?

a. 19 c. 7

b. 11 d. 12

5- 10. How many ways can you choose up to three items from a set of seven different items?

a. 21 c. 35

b. 259 d. 2187