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Standard IX

Mathematics

Experimental/Empirical Probability

There are 4...

Question

There are $40$ students in a class and their results is presented as below :
Result (Pass/Fail) Pass Fail
Number of Students $30$ $10$
If a student chosen at random out of the class, find the probability that the student has passed the examination.

0.75

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0.6

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0.45

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0.30

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Solution

The correct option is A $0.75$
Total number of chances $= 40$
Chances or trials which favour a student to pass $= 30$
The probability of the required event, i.e., the student has passed the examination $= \frac{30}{40} = 0.75$

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There are 40 students in a class and their results is presented as below :Result (Pass/Fail)PassFailNumber of Students3010If a student chosen at random out of the class, find the probability that the student has passed the examination.

The correct option is A 0.75Total number of chances =40Chances or trials which favour a student to pass =30The probability of the required event, i.e., the student has passed the examination =3040=0.75

There are $40$ students in a class and their results is presented as below :
Result (Pass/Fail) Pass Fail
Number of Students $30$ $10$
If a student chosen at random out of the class, find the probability that the student has passed the examination.

The correct option is A $0.75$
Total number of chances $= 40$
Chances or trials which favour a student to pass $= 30$
The probability of the required event, i.e., the student has passed the examination $= \frac{30}{40} = 0.75$