Question

the median of 30 no. is 45 ,if the mean of 29 no. is also 45, then the 30th no.

Answer 1

$\huge\boxed{\texttt{\fcolorbox{Red}{aqua}{Hey Mate!!!}}}$

$<b><i><font face=Copper black size=4 color=blue>$ Here is your answer.
Mean = Sum of All Numbers/Total Numbers

Sum of All Numbers = Mean × Total Numbers

Sum of 30 Numbers = 45 × 30
= 1350

Sum of 29 Numbers = 29 × 45
= 1305

Therefore 30th Number is = 1350 - 1305
= 45

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Answer 2

Here is your answer

The 30th Number = (30×45) - (29×45)

=. 1350 - 1305

= 45

Hope it helps