Question

the mean of 3 no. is 12 . two of the no. are 9&14 what is the third no.

Answer 1

Answer:

Hope so it helps you

please fol.low ( ❛ ᴗ ❛)

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Answer 2

$\large\sf\underline{Given}$

• Mean of three numbers is 12.

• Two numbers are 9 and 14 .

$\large\sf\underline{To\:find}$

• The third number.

$\large\sf\underline{Solution}$

• Let the third number be x.

We know,

$\small{\underline{\boxed{\mathrm\red{Mean=\frac{Sum\:of\:all\:the\:terms}{number\:of\:terms}}}}}$

$\sf\:⟹\:12=\:\frac{9+14+x}{3}$

$\sf\:⟹\:12=\:\frac{23+x}{3}$

$\sf\:⟹\:23+x=\:12 \times 3$

$\sf\:⟹\:23+x=\:36$

$\sf\:⟹\:x=\:36-23$

$\large{\underline{\boxed{\mathrm\pink{↦\:x=13}}}}$

⚘ sᴏ ᴛʜᴇ ᴛʜɪʀᴅ ɴᴜᴍʙᴇʀ ɪs 13 .

• Thnku :)