Question

The average of three numbers is 8. If two of the numbers are 9 and 7 the

third number is



​

Answer 1

Answer:

• Third number = 8

Step-by-step explanation:

Given that:

• The average of three numbers is 8.
• Two of the numbers are 9 and 7.

To Find:

• Third number.

Let us assume:

• The third number be x.

Formula used:

• Average = (Sum of numbers) / (Total number)

Finding the third number:

Average = (Sum of numbers) / (Total number)

⇒ 8 = (9 + 7 + x)/3

⇒ 9 + 7 + x = 8 × 3

⇒ 16 + x = 24

⇒ x = 24 - 16

⇒ x = 8

Answer 2

Question:-

• The average of three numbers is 8. If two of the numbers are 9 and 7 the third number is

Given:-

• The average of three numbers of 8. If two numbers are 9 , 7.

To Find:-

• Find the third side.

Solution:-

Let the third side be " x "

$\tt\implies \: Average = \dfrac { Sum \: of \: numbers } { Total \: number }$

$\tt\implies \: 8 = \dfrac { 9 + 7 + x } { 3 }$

$\tt\implies \: 8 \times 3 = 16 + x$

$\tt\implies \: 16 + x = 24$

$\tt\implies \: x = 24 - 16$

$\tt\implies \: x = 8$

Hence ,

• The third side of 8 .