Question 1107631
Let {{{ T[1] }}} = the total of the 3 numbers
Let {{{ T[2] }}} = the total of the 5 numbers
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(1) {{{ 20 = T[1] / 3 }}}
(2) {{{ 12 = T[2] / 5 }}}
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(1) {{{ T[1] = 3*20 }}}
(1) {{{ T[1] = 60 }}}
and
(2) {{{ T[2] = 5*12 }}}
(2) {{{ T[2] = 60 }}}
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Let {{{ M }}} = the mean of the 8 numbers
{{{ M = ( T[1] + T[2] ) / 8 }}}
{{{ M = ( 60 + 60 ) / 8 }}}
{{{ M = 120/8 }}}
{{{ M = 15 }}}
The mean of the 8 numbers is 15