1. A bag contains 3 red balls, 4 white balls, 7 yellow balls and 8 black balls
The number of elements in a sample space will be:

2. n C n-r is equal to:

3.
• 3.
  • The set S= {0, 1} which binary operation is defined in S:

4. In how many ways can a four digit number be formed from the set of digits (1,5,7,9} if digits is
repeated:

5. A and B are non singular matrices then (AB) -1 =?

6. 20 P 3 is equal to:

7. If A is 2x 3 matrix and B is 3 x 2 matrix then A and B are conformable for:

8. if a*b =2a -3b + ab, then 3 * 5+5*3 is equal to ?

9. If P * Q = P+Q+P/Q, then the value of 8*2 is ?

10. A dice is thrown then the probability to get an even number is: