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The mean proportional between 68 and 272 is:

A114

B136

C126

D124

Answer:

B. 136

Read Explanation:

The mean proportional (geometric mean) between two numbers (a) and (b) is:

a×b\sqrt{a \times b}

Apply formula

68×272\sqrt{68 \times 272}

68×272=1849668 \times 272 = 18496

Square root

18496=136\sqrt{18496} = 136

Final Answer: 136


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