a total of nine students appear in an examination, in how many ways can the result be announced?Choices:- 1024 512 256 2048

If a teacher wants to choose 3 students as a group to participate in a math exam, the total number of students in the class is 10, how many options for the teacher?

Ten participants are participating in a competition. In how many ways can the first three prizes be won?Choices:- 920 620 720 850

In a class of 72 students, 32 students cleared only Maths exam and 16 cleared only Physics exam. If four students could not clear both the subjects' exams, then how many students cleared both the subjects' exams? Ops: A. 20 B. 18 C. 10 D. 15 Q 28. How many numbers between 40,000 and 50,000 can be formed with the digits 0, 1, 2, 3, 4, 5, 6 when the repetition of digits is not allowed? Ops: A. 360 B. 480 C. 880 D. 720 Q 29. The average of marks obtained by 76 candidates in a certain examination is 32. If the average score of passed candidates is 40 and that of the failed candidates is 2, what is the number of candidates who failed the examination? Ops: A. 7 B. 12 C. 9 D. 16 Q 30. Mary selects a number out of first 32 even numbers at random. What is the probability that this number will be a multiple of 4? Ops: A. 1/3 B. 2/3 C. 3/5 D. 1/2

There are 9 students in a class. The teacher chooses 2 students to go to the library. The order in which they are chosen does not matter. How many ways are there to choose the students?A.81B.504C.72D.36

1280. Students and Examinations