Question 1095028
[ average ] = [ sum of numbers ] / [ how many numbers ]
{{{ 14 = S[1] / 4 }}}
{{{ S[1] = 56 }}}
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For 3 of the numbers:
{{{ 12 = S[2] / 3 }}}
{{{ S[2] = 36 }}}
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{{{ S[1] - S[2] = 56 - 36 }}}
{{{ S[1] - S[2] = 20 }}}
The 4th number is 20