What is the average age of the class that has 60 students?
I. The average age of the boys in the class is 23 years.II. The average age of the girls in the class is 21 years.
III. The ratio of the boys and girls in the class is 2 : 1

None of the three statements can be dispensed with

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Only III

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Both I and II

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Either of the three statements can be dispensed with

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Solution

The correct option is A None of the three statements can be dispensed with
We need both the statements as both the average age of students as well as number of boys and girls are required.

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What is the average age of the class that has 60 students?I. The average age of the boys in the class is 23 years.II. The average age of the girls in the class is 21 years.III. The ratio of the boys and girls in the class is 2 : 1

The correct option is A None of the three statements can be dispensed withWe need both the statements as both the average age of students as well as number of boys and girls are required.

What is the average age of the class that has 60 students?
I. The average age of the boys in the class is 23 years.II. The average age of the girls in the class is 21 years.
III. The ratio of the boys and girls in the class is 2 : 1

The correct option is A None of the three statements can be dispensed with
We need both the statements as both the average age of students as well as number of boys and girls are required.