mean=46+64+87+41+58+77+35+90+55+35+92
_____________________________________
11
= 680
________________________________
11
=61.81
mean of this 11 nos.=61.81
therefore,total of 11 nos.=11*61.81
=679.91
new total=679.91-(90-19)
=679.91-71
=608.91
new mean= 608.91
________________
11
=55.3554545455