Question

Average of 8 numbers is 80. If average of first four and

Let fifth and sixth numbers be 7x and 5x, respectively. So, 7x 5x 80 8 60 7 50 5 300 Or, 12x 300 Or, x 25 So, fifth number 25 7 175

last two numbers is 80 and 60, respectively then find the fifth number given that ratio of fifth and sixth number is 7:5, respectively.

A 155

B 165

C 175

D 135

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