In making an alloy, a substance of specific gravity $s_1$ and mass $m_1$ is mixed with another substance of specific gravity $s_2$ and mass $m_2$ then the specific gravity of the alloy is
In making an alloy, a substance of specific gravity $s_1$ and mass $m_1$ is mixed with another substance of specific gravity $s_2$ and mass $m_2$ then the specific gravity of the alloy is
- A
$\left( {\frac{{{m_1} + {m_2}}}{{{s_1} + {s_2}}}} \right)$
- B
$\left( {\frac{{{s_1}{s_2}}}{{{m_1} + {m_2}}}} \right)$
- C
$\left[ {\frac{{{m_1} + {m_2}}}{{({m_1}/{s_1}\, + \,{m_2}/{s_2})}}} \right]$
- D
$\left[ {\frac{{({m_1}/{s_1}\, + \,{m_2}/{s_2})}}{{{m_1} + {m_2}}}} \right]$
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