The arithmetic mean of a set of 20 values is 76. if each of the 20 values is divided by 4, then its new mean is
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I'm not sure whether this answer is correct or not, nobody is answering this question, so if you have the answer which matches with my answer then please tell me....
my answer is like this,
let all values be, a, b c, d, e, f, g, h, i, j, k, l, m, n, o, q, r, s.
now Mean = Sum of all observations / Total number of observations
a + b + c + d......q + r + s / 20 = 76
a + b + c + d......q + r + s = 76 × 20
a + b + c + d......q + r + s = 1520
a + b + c + d......q + r + s / 4 = 1520 / 4
a + b + c + d......q + r + s / 4 = 380
New Mean,
a + b + c + d......q + r + s / 20 = 380 / 20 = 19
if answer is correct, tell me please
my answer is like this,
let all values be, a, b c, d, e, f, g, h, i, j, k, l, m, n, o, q, r, s.
now Mean = Sum of all observations / Total number of observations
a + b + c + d......q + r + s / 20 = 76
a + b + c + d......q + r + s = 76 × 20
a + b + c + d......q + r + s = 1520
a + b + c + d......q + r + s / 4 = 1520 / 4
a + b + c + d......q + r + s / 4 = 380
New Mean,
a + b + c + d......q + r + s / 20 = 380 / 20 = 19
if answer is correct, tell me please
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