Question

the average of seven numbers is 8. If one of the number is 17 and if it is replaced by 31, the average becomes​

Answer 1

$\bf{\underline{Question:-}}$

the average of seven numbers is 8. If one of the number is 17 and if it is replaced by 31, the average becomes

$\bf{\underline{Given:-}}$

• Average of seven number is 8
• If one number is 17
• if it's replaced by 31

$\bf{\underline{To\:Find:-}}$

• New average = ?

$\bf{\underline{Solution:-}}$

★ According to the question,

→ Actual number = 17

→ New number = 31

→ Difference = 37 - 17 = 14

→Difference '14' effects the seven numbers

14/7 = 2

$\bf{\underline{Hence:-}}$

• Present average = 18
• New average = 18 + 2 = 20

Answer 2

Answer:

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Step-by-step explanation:

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