Question

A student is to answer 10 out of 12 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

Answer 1

2 choices available to him

Answer 2

Answer:

140

Step-by-step explanation:

• The student has to answer 10 out of 12 questions in the examination and it is mandatory for him to answer atleast 4 out of the first five questions.
• He can do this in the following way

To choose 4 from first five we have 5C4 and to choose remaining 6 from the remaining 8 questions we have 8C6

5C4 * 8C6 = 5*28=140