Question

help me if you know this correctly​

Answer 1

Answer:

12

Step-by-step explanation:

It is given that the question paper consists of 3 and 4 questions respectively.

Number of ways in which 1 question can be selected out of 3 are:

= C(3,1)

Number of ways in which 1 question can be selected out of 4 are:

= C(4,1)

Now,

Total number of ways = C(3,1) * C(4,1)

                                     = 3 * 4

                                     = 12.

Hope it helps!

Answer 2

You can answer 1 of 3 questions in the first group. That is 3 possibilities. For each of those three possibilities, you can answer 1 of 4 questions in the second group.  

So for each possibility in the first group there are 4 possibilities in the second group. That is a total of 3*4 = 12 different ways to answer one question from each group.