A student is to answer 10 out of 13 questions in an examination such that he must choose at least 4 from the first five questions. The number of choices available to him is
196
280
346
140
As we learnt in
Theorem of Combination -
Each of the different groups or selection which can be made by taking r things from n things is called a combination.
- wherein
Where
Choose 10 out of 13 questions and choose at least 4 out of first five.
Choices and
Total = 196
Correct option is 1.
Option 1)
196
This is the correct option.
Option 2)
280
This is an incorrect option.
Option 3)
346
This is an incorrect option.
Option 4)
140
This is an incorrect option.