In an examination, the maximum mark for each of the three papers is 50 and the maximum mark for the fourth paper is 100. Find the number of ways in which the candidate can score 60% marks in aggregate.

Find the number of ways in which 16 constables can be assigned to patrol villages, 2 for each.

There are 10 bulbs in a room. Each one of them can be operated independently . Find the number of ways in which the room can be illuminated .

There are 10 bulbs in a room . Each one of them can be operated independently. Find the number of ways in which the room can be illuminated.

There are 10 bulbs in a room. Each one of them can be operated indipendently. Find the number of ways in which the room can be illuminated I is.

In an examination of nine papers, a candidate has to pass in more papers than the number of paper in which he fails in order to be successful. The number of ways in which he can be unsuccessful is a. 256 b. 256 c. 193 d. 319

Mean marks scored by the students of a class is 53. The mean mark of the girls is 55 and the mean mark of the boys is 50. What is the percentage of girls in the class?

4 boys and 4 girls from a line with the boys and girls alternating. Find the number of ways of marking this line.