(B) 155
(C) 110
(D) 120
(E) None of these
1. If the mean of 19 observations is 40,
three observations 31, 35 and 48 are
deleted and one observation 68 is
included. Then, find the mean of the
final observations.
(A) 38
(B) 40
(C) 42
(D) 44
(E) None of these
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it was discovered that one observation 14 was misread as 24. Find the ... 10 is the mean of a set of 7 observations and 5 is the mean of a set of 3 observations. The mean of a ... If a means +, b means –, c means × & d means ÷, then 18 c 14 a 6 b 16 d 4 = ? ... This was 10 too high, so the correct sum is 280-10=270.
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