Question

The average of five numbers is 15.8. The average of first three numbers is 13 and the average of last three numbers is 19. Third number is

• A. 15
• B. 16
• C. 17
• D. 18

Answer 1

Answer:

C. 17

Sum of first 3 numbers = 13x3 =39 sum of last number = 19x3=57 Sum of all 5 numbers = 15.8x5=79 Third number = 39+57-79 = 96-79=17