11-05-2020
Mathematics

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the mean of five numbers is 10. four of the numbers are 4, 6 , 7 and 13. What is the fifth number?

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valeriechew1114 valeriechew1114

11-05-2020

The answer is twenty

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Thakshaya7734 Thakshaya7734

11-05-2020

Answer:

Step-by-step explanation:

mean=10

mean=[tex]\frac{a+b+c+d+e}{5}[/tex]

∴10=[tex]\frac{4+6+7+13+e}{5}[/tex]

∴50=30+e

∴e=50-30

∴e=20

∴the fifth number is 20

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