Question

Attendance registere a contains names or 30 studentsin math class and attendance registere B containsnames of 35 students in English class.There are20 identical nemes existing in both attendanceregisters. What is the total number ofindividual students whose names exist atleast once in any of
the two registers?

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Answer 1

Answer:

ok

Step-by-step explanation:

Given that 30% have full attendance and 70% are irregular.

Let the probability of having full attendance be a=0.3.

Let the probability of having irregular attendance be b=0.7.

Given that 70% of students having 100% attendance attain grade A and 10% irregular students attain grade A.

The probability of student picked up having grade A will be 0.7×0.3+0.7×0.1=0.21+0.07=0.28

The probabilty that the picked student is having 100% attendance will be 0.280.21=43.

No, regularity is required in every aspect of our life.