passpadi

2012

Mathematics

67ca00ce0c643c71d77dee1f

The mean of seven numbers is 96. If an eighth number is added, the mean becomes 112. Find the eighth number.

A.

126

B.

180

C.

216

D.

224

Correct Answer: 224

Explanation

x/7 = 96/1 ==> 672/ + x/8 =112 Therefore x = 224

x/7 = 96/1 ==> 672/ + x/8 =112 Therefore x = 224
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