What is the average (arithmetic mean) height of the n people of a certain group? (1) Height of the tallest person in the group is 6 feet 2.5 inches and the average height of the rest of the people in the group is 5 feet 10 inches (2) The sum of the heights of the n people is 178 feet 9 inches Options: A . &nbsp If the question can be answered with statement 1 alone B . &nbsp If the question can be answered with statement 2 alone C . &nbsp If both statement 1 and statement 2 are needed to answer the question and D . &nbsp If the question cannot be answered even with the help of both statements

What is the average (arithmetic mean) height of the n people of a certain grou

Question

What is the average (arithmetic mean) height of the n people of a certain group?

(1) Height of the tallest person in the group is 6 feet 2.5 inches and the average height of the rest of the people in the group is 5 feet 10 inches

(2) The sum of the heights of the n people is 178 feet 9 inches

Options:

A . If the question can be answered with statement 1 alone

B . If the question can be answered with statement 2 alone

C . If both statement 1 and statement 2 are needed to answer the question and

D . If the question cannot be answered even with the help of both statements

Answer: Option C
:
C

F r o m s t a t e m e n t 1 : \frac{74.5 + (n - 1) 70}{n}

F r o m s t a t e m e n t 2 : 74.5 + (n - 1) 70 = 2145

Using both the statements, average height of the n people can be determined.

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