Question

can you answer this question ???​

Answer 1

$\mathrm{\bigstar\;\;Mean = \dfrac{Sum\;of\;all\;Observations}{Total\;Number\;of\;Observations}}$

●  Mean of 15 Numbers is 35

$\mathrm{\implies \dfrac{Sum\;of\;15\;Numbers}{15} = 35}$

$\mathrm{\implies Sum\;of\;15\;Numbers = (35 \times 15)}$

$\mathrm{\implies Sum\;of\;15\;Numbers = 525}$

$\mathrm{\implies Sum\;of\;10\;Numbers + Sum\;of\;5\;Numbers = 525}$

●  Five numbers are excluded, Mean of 10 remaining numbers = 28

$\mathrm{\implies \dfrac{Sum\;of\;10\;remaining\;Numbers}{10} = 28}$

$\mathrm{\implies Sum\;of\;10\;remaining\;Numbers = 280}$

$\implies \text{280 + Sum of 5 Excluded Numbers = 525}$

$\implies \text{Sum of 5 Excluded Numbers = 525 - 280}$

$\implies \text{Sum of 5 Excluded Numbers = 245}$

$\implies \mathrm{\dfrac{Sum\;of\;5\;Excluded\;Numbers}{5} = \dfrac{245}{5}}$

$\implies \text{Mean of Excluded 5 Numbers = 49}$