Question 819529
The amount of A in the mixture is
{{{ .54*47 = 25.38 }}} kg
The amount of B is {{{ 47 - 25.38 = 21.62 }}}
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Let {{{ b }}} = the kg of B to be added
{{{ ( 21.62 + b ) / 47 = .5 }}}
{{{ 21.62 + b = .5*47 }}}
{{{ b = 23.5 - 21.62 }}}
{{{ b = 1.88 }}}
1.88 kg of B needs to be added