Hi  

The average of 5 numbers is 9. Four of the numbers are 2, 1, 6, and 13. 

What is the fifth number? Let that be x

(2 + 1 + 6 + 13 + x)/5 = 9 

22 + x = 45

  x = 23 

RELATED QUESTIONS

the average of 5 numbers is 10. the first four numbers are 8, 9, 10, 11. find the fifth... (answered by FrankM,stanbon)

The average of five numbers is 328.8 four of the numbers are:240,345,238 and 437.what is... (answered by Edwin McCravy)

The average of 10 numbers is 13. The average of the first 6 numbers is 14 and
 that of... (answered by Fombitz)

The average of four numbers is 11. If 6, a fifth number is added to the four numbers what  (answered by josmiceli)

The mean of five numbers is 12 . If the first four numbers are 7,9,10 and 13 , find the... (answered by Cromlix)

The average of five numbers is 32.Four of the numbers are 28, 29,30 and 35.What is the... (answered by oscargut)

The average of five numbers is 10. The fifth number is 6. What is the average of the... (answered by ewatrrr)

The average of 5 numbers is 13. If the average of 4 of these numbers is 10, what is the... (answered by CharlesG2)

The mean of five numbers is 56. Four of the numbers are the same. The average of one of... (answered by ankor@dixie-net.com)