Question
The average age of a group of
five friends is 78 years. If a friend, aged 48 years, is replaced by another friend, then the average age of each friend in the group will increase by 4 years. Find the age of the friend who was replaced.Solution
ATQ,
Sum of the ages of 5 friends, initially = 5 X 78 = 390 years Let the age of the new friend who joined the group = 'y' years Therefore, 390 - 48 + y = 5 X (78 + 4) Or, 'y' = 410 - 342 = 68 Therefore, age of the new friend = 68 years Alternate Solution Age of the new friend = age of the friend replaced + increase in average age X number of friends So, age of the new friend = 48 + 5 X 4 = 48 + 20 = 68 years
The following question , consists of an incomplete sentence or a sentence which is split into four parts. All four parts are jumbled up and are named a...
Which of the following is the third sentence of the passage?
Directions: Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the correct order to form a meaningful and coherent par...
Which sentence should come fifth in the paragraph?
Which of the following is the fifth sentence in the passage?
Two years after it wrecked havoc in some delta districts , cyclone Gaja looms over the fate of candidates in nine assembly constituencies in the region....
Given below are a few sentences in which four words are emboldened each. The words may or may not be in their correct position. Rearrange the words if ...
Given below are six sentences, four of which (P, Q, R, S), are jumbled. Pick the option that gives the correct order of P, Q, R, S.
S - 1. The si...
The question consists of five statements labelled A, B, C, D and E which when logically ordered form a coherent passage. Choose the option that represe...
Given below are six sentences, four of which (P, Q. R, S), are jumbled. Pick the option that gives the correct order of P, Q, R, S.
S-1 A summary...
Relevant for Exams:
