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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%?

Options

  • `1/6`

  • `1/3`

  • `5/6`

  • `1/2`

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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?
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APPEARS IN

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