Identify the discrete variables.
1.Number of students in each class of a school
2.Number of heads obtained in ten tosses of a coin
3.Marks scored by students in an objective type examination with negative marking for incorrect responses
4.Height of students in a school
A1, 2 & 3 only ✓ Correct
B1 & 2 only
C1, 2 & 4 only
D3 & 4 only
Correct answer: (A) 1, 2 & 3 only
Explanation
Discrete variables take countable, separate values. Number of students, number of heads in tosses, and marks under negative marking all change in fixed steps, so A, B and C are discrete. Height varies continuously, so D is not discrete.
Want more like this? Create a free account to practise a full test, track your progress, and get spaced-repetition review.
Practise on Mcqkart →🎓 Book an expert →