Competititve Exams Materials
(Q) The average of five numbers is 306.4. The average of the first two numbers is 431 and the average of the last two numbers is 214.5. What is the third number?
A) 336
B) 370
C) 241
D) 284
Explanation : Here, total sum of 5 numbers
= 5 × 306.4 = 1532
Total sum of first two numbers
= 2 × 431= 862
Total sum of last two numbers
= 2 × 214.5= 429
∴ Third number = 1532 — (862 + 429)= 241
B) 370
C) 241
D) 284
View Answer
C) 241Explanation : Here, total sum of 5 numbers
= 5 × 306.4 = 1532
Total sum of first two numbers
= 2 × 431= 862
Total sum of last two numbers
= 2 × 214.5= 429
∴ Third number = 1532 — (862 + 429)= 241
View related categories
Aptitude : Average
Subscribe to:
Posts (Atom)