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The heights of 20 students=161,148,157,153,157,
162,159,151,154,156,153,157,155,163,155,147,152,
160,165,152.
: Average heights of 20 students=161+148+157+
153+157+162+159+151+154+156+153+157+155+
163+155+147+152+160+165+152.
=3117÷20
=155.85.
162,159,151,154,156,153,157,155,163,155,147,152,
160,165,152.
: Average heights of 20 students=161+148+157+
153+157+162+159+151+154+156+153+157+155+
163+155+147+152+160+165+152.
=3117÷20
=155.85.
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