Question

6. The ages of five students are 16 years, 13 years, x years and 12 years.
their average age is 14 years, find the value of x.​

Answer 1

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Step-by-step explanation:

Total No. Of Student =5

Sum Of Student Age = 16+13+12+14=45

45/5 = 9 ans

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Answer 2

${\bold\blue{Question:-}}$

The ages of five students are 16 years, 13 years, x years and 12 years. Their average age is 14 years, find the value of x.

${\bold\green{Solution:-}}$

• Number of terms = 5

• Sum of the terms = 55 + x

• Mean = 14

${\bold\blue{To find,}}$

• value of x ?

we know that,

• $average = \frac{sum \: of \: the \: terms}{number \: of \: terms}$

By putting the values, we have

➥$14 = \frac{16 + 13 + x +12 + 14}{5}$

➥$14 = \frac{55 + x}{5}$

➥14 × 5 = 55 + x

➥70 = 55 + x

➥x = 70 - 55

➥x = 15

∴ The value of x is 15 years.

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