The average of five numbers is 58. The average of the first two numbers is 48.5 and the average of the last two numbers is 53.5. What is the third number?
Note
Third number = (Sum of 5 numbers) - (Sum of 4 numbers)
= (58 × 5) - [(48.5 × 2) + (53.5 × 2)]
= 290 - (97 + 107)
= 290 - 204
= 86