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Question 143
If the arithmetic mean of some observations is 26.5 and their median is 25.4. then their mode is:
Solution
.
Arithmetic mean=26.5
Median=25.4
Using empirical formula,
mode=3$$\times\ $$median$$\ -\ $$2$$\times\ $$mean
=3$$\times\ $$25.4$$\ -\ $$2$$\times\ $$26.5
=76.2$$\ -\ $$53
=23.2
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