The following question consists of three statements I, II and III are given below. You have to decide whether the data provided in the statements are sufficient to answer the question.

What is the average of weight of girls in the class?

I. Average weight of all the 60 students is 42 kg.

II. Average weight of boys is 43 kg.

III. Total weight of all girls together is 1144 kg.

(a) I and II only (b) II and III only (c) All I, II and III (d) All two of the three

The following question consists of three statements I, II and III are given below. You have to decide whether the data provided in the statements are sufficient to answer the question.

What is the average of weight of girls in the class?

I. Average weight of all the 60 students is 42 kg.

II. Average weight of boys is 43 kg.

III. Total weight of all girls together is 1144 kg.

(a) I and II only (b) II and III only (c) All I, II and III (d) All two of the three

1 Answer

127 votes

I. gives, sum of weights of 60 students = kg

II. gives, if there be boys in the class, sum of weights of boys

= 43 kg …

III. gives, sum of weights of all girls = 1144 kg …

From we have

So, the number of boys = 32, number of girls =

Thus, I, II, III are needed to find the answer.

127 votes

127