The average of five numbers is 12.4. the average of four of these numbers is 11. what is the value of the fifth number?

The value of the fifth number will be 18.

Since the average of five numbers is 12.4, their total value will be:

= 12.4 × 5 = 62

Since the average of four of these numbers is 11, their total value will be:

= 11 × 4 = 44

Therefore, the value of the last number will be:

= 62 - 44 = 18

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average of 4 numbers is 11 so 11*4 = 44

average of 5 numbers is 12.4 so 12.4*5 = 62

the 5th number = 62-44 = 18

maybe i can

step-by-step explanation:

f(gx)=f(1/x+2)

=(1/x+2)+2

=(1+2x)/2+2

=(1+2x+4)/2

= (2x+5)/2