Question

the average of three number is 24 .If first and second numbers are 18 and 19,find the third number​

Answer 1

Answer :-

To find,

the third number whose average is 24

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Given,

first no. = 18

second no. = 19

average = 24

let the third no. be = x

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average = total sum of all no./ Number of items in the set.

=> (18 + 19 + x)/3 = 24

=> 37 + x = 72

=> x = 72 - 37

=> x = 35

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So, the third no. is = 35

Hope it's helpful

Thank you

Answer 2

GIVEN :–

• The average of three number is 24.

• First and second numbers are 18 and 19.

TO FIND :–

• Third number = ?

SOLUTION :–

• Let the third number is 'x'.

• We know that –

$\\\rm \implies \red{Average = \dfrac{Total \: \: sum \: \: of \: \: all \: \: numbers }{Number \: \: of \: \: item \: \: in \: \: the \: \: set} }$

• Put the values –

$\\ \rm \implies 24 = \dfrac{18 + 19 + x}{3}$

$\\ \rm \implies 24 \times 3 =18 + 19 + x$

$\\ \rm \implies 72=37+ x$

$\\ \rm \implies x = 72 - 37$

$\\\implies \pink{\boxed{\boxed{ \rm x =35}}}$

• Hence , The third number is 35.