The average of five positive numbers is 213. The average of the first two numbers is 233.5 and the average of last two numbers is 271. What is the third number?
(a) 64 (b) 56 (c) 106 (d) Cannot be determined (e) None of these
The sum of five numbers = 5*213=1065
The sum of first two numbers = 2*233.5=467.0
The sum of the last two numbers=271*2=542
Third number = 1065-(467+542)
=56