The average 12

The average of the first five numbers drawn was 2499. the first four numbers were 4165, 320, 7142, and 64. What was the fifth number?

Correct answer:

a5 =  804

Step-by-step explanation:

m=2499 n=5  a1=4165 a2=320 a3=7142 a4=64  m = nΣ a  m = na1+a2+a3+a4+a5  a5=n ma1a2a3a4=5 24994165320714264=804   Verifying Solution:   s5=a1+a2+a3+a4+a5=4165+320+7142+64+804=12495 μ=ns5=512495=2499

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