The mean of a set of six numbers is 60. If the mean of th...
The mean of a set of six numbers is 60. If the mean of the first five is 50, find the sixth number in the set.
105
100
95
110
Correct answer is D
Let the sum of the first five numbers and the sixth number be x and t respectively.
x+t6=60⟹x+t=360
x5=50⟹x=250
∴
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