Question

In a class of 25 students,the probability that any one girls will be absent on an given day is 0.2. the probability of one of the boys being student 0.3.b calculate the probability of that all student present at Tuesday.

Answer 1

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Here is the solution:

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Total students = 25

P(girl absent) = 0.2

P(boy absent) = 0.3

P(everyone is present) = 1 - 0.2 - 0.3 = 0.5

Answer: The probability of all student present on Tuesday is 0.5

Answer 2

We can analyze the question as follows :

p(Girl absent) = 0.2

P(boy absent = 0.3)

We want the probability that all students will be present.

This is given by:

P(that all students are present ) = 1 - P(A Girl is absent) - P(Boy absent)

This is given as follows:

= 1 - 0.2 - 0.3 = 0.5

Answer:

0.5