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If a, b, c, d, e are five consecutive odd numbers, their average is
Answer & Solution
Correct Answer:
Option
D
Clearly,
b = a + 2
c = a + 4
d = a + 6
e = a + 8
∴ Average
$$\eqalign{ & = \frac{{a + \left( {a + 2} \right) + \left( {a + 4} \right) + \left( {a + 6} \right) + \left( {a + 8} \right)}}{5} \cr & = \left( {\frac{{5a + 20}}{5}} \right) \cr & = \left( {a + 4} \right) \cr} $$
b = a + 2
c = a + 4
d = a + 6
e = a + 8
∴ Average
$$\eqalign{ & = \frac{{a + \left( {a + 2} \right) + \left( {a + 4} \right) + \left( {a + 6} \right) + \left( {a + 8} \right)}}{5} \cr & = \left( {\frac{{5a + 20}}{5}} \right) \cr & = \left( {a + 4} \right) \cr} $$
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