Question

The average of four number is 72.Three of the number are 68,70 and 65 find the fourth number​

Answer 1

$\huge\underline\mathsf\pink{Question:-}$

The average of four number is 72.Three of the number are 68,70 and 65 find the fourth number.

$\huge\underline\mathsf\pink{Answer:-}$

Let take the fourth number a

Average of total fourth number is 72.

$\frac{68 + 70 + 65 + a}{4} = 72$

68+ 70 + 65 + a = 72 × 4

195 + a = 288

$a = \frac{288}{203}$

$a = 85$

Hence, the fourth number is 85.

Answer 2

Answer:

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Step-by-step explanation:

The average of four number is 72.Three of the number are 68,70 and 65 find the fourth number.

Answer:−

Let take the fourth number a

Average of total fourth number is 72.

\frac{68 + 70 + 65 + a}{4} = 72

4

68+70+65+a

=72

68+ 70 + 65 + a = 72 × 4

195 + a = 288

a = \frac{288}{203}a=

203

288

a = 85a=85