The Percentage of Attendance of Different Classes in a Year in a School is Given Below: - Mathematics

MCQ

The percentage of attendance of different classes in a year in a school is given below:

 Class: X IX VIII VII VI V Attendance: 30 62 85 92 76 55

What is the probability that the class attendance is more than 75%?

• 1/6

• 1/3

• 5/6

• 1/2

Solution

The total number of trials is 6.

Let be the event that the attendance of a class is more than 75%.

The number of times A happens is 3 (for classes’ VIII, VII and VI).

Remember the empirical or experimental or observed frequency approach to probability.

If n be the total number of trials of an experiment and A is an event associated to it such that A happens in m-trials. Then the empirical probability of happening of event is denoted by P(A) and is given by

P(A) = m/n

Therefore, we have

 P (A) = 3/6

=1/2

Is there an error in this question or solution?

APPEARS IN

RD Sharma Mathematics for Class 9
Chapter 25 Probability
Q 8 | Page 17