Of the students in a school,it is known that 30% have 100% attendance and 70% students are irregular.Previous year results report that 70% of all students who have 100% attendance attain A grade and 10% irregular students attain A grade in their annual examination.At the end of the year,one student is chosen at random from the school and he was found to have an A grade.What is the probability that the student has 100% attendance? Is regularity required only in school? Justify your answer.

Of the students in a school,it is known that 30% have 100% attendance

1.	Of the students in a school,it is known that 30% have 100% attendance and 70% students are irregular.Previous year results report that 70% of all students who have 100% attendance attain A grade and 10% irregular students attain A grade in their annual examination.At the end of the year,one student is chosen at random from the school and he was found to have an A grade.What is the probability that the student has 100% attendance? Is regularity required only in school? Justify your answer.
Answer» Of the students in a school,it is known that 30% have 100% attendance and 70% students are irregular.Previous year results report that 70% of all students who have 100% attendance attain A grade and 10% irregular students attain A grade in their annual examination.At the end of the year,one student is chosen at random from the school and he was found to have an A grade.What is the probability that the student has 100% attendance? Is regularity required only in school? Justify your answer.