The arithmetic mean of 23, 16, 30, 33 and two other numbers that differ by 2 is 27. If the smallest of these 6 numbers is discarded, find the arithmetic mean of the remaining 5 numbers.
The arithmetic mean of 23, 16, 30, 33 and two other numbers that differ by 2 is 27. If the smallest of these 6 numbers is discarded, find the arithmetic mean of the remaining 5 numbers.
[ 16 + 23 + 30 + 33 + x + (x+2) ] / 6 = 27
[ 102 + 2x + 2 ] / 6 = 27
[ 102 + 2x + 2 ] = 162
2x = 162 – 104 = 58
x = 29 & x+2 = 31
New Mean = (16 + 23 + 30 + 33 + 31) / 5
= 133 / 5
= 26.6
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