Question 1137578
Let {{{ a }}} = the mass of the added pumpkin
Let {{{ b }}} = the total mass of the pumpkins
without the added pumpkin
{{{ b/50 = 2.1 }}}
{{{ ( b + a ) / 51 = 2.2 }}}
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{{{ b = 2.1*50 }}}
{{{ b = 105 }}}
and
{{{ ( 105 + a ) / 51 = 2.2 }}}
{{{ 105 + a = 112.2 }}}
{{{ a = 7.2 }}}
The extra pumpkin weighs 7.2 kg
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check:
{{{ ( 105 + 7.2 ) / 51 = 2.2 }}}
{{{ 112.2 = 2.2*51 }}}
{{{ 112.2 = 112.2 }}}
OK