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Rataan = jumlah semua bilangan /banyak ukuran.5.1 + 6.5 +7.6 + 8.x + 9.3 + 10.1 / 1+5+6+ x+3+1 = 7,3.
5 + 30 + 42 + 8x + 27 + 10 / ( 16 + x )
( 114 + 8x ) / ( 16 + x ) = 7,3
( 114 + 8x ) = 116,8 + 7,3x
8x - 7,3x = 116,8 - 114
0,7x = 2,8
x = 4
b) setelah x diganti dengan 4, maka tampak median = modus = 7.