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Byju's Answer
Standard VII
Mathematics
Proportions
Find the mean...
Question
Find the mean proportional of 3 and 27 .
A
7
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B
9
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C
27
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D
24
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Solution
The correct option is
B
9
The mean proportional of 3 and
27
=
+
√
3
×
27
=
+
√
81
=
9
.
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0
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