Progression (Sequence and Series)Hard
Question
The S.D. of 15 items is 6 and if each item is decreased by 1, then standard deviation will be-
Options
A.5
B.7
C.91 / 25
D.6
More Progression (Sequence and Series) Questions
Three numbers are in A.P. The product of the extremes is 5 times the mean, also the sum of the two largest is 8 times th...Let a1, a2, ......, a10 be in A.P. & h1, h2, ...... h10 be in H.P.. If a1 = h1= 2 & a10 = h10 = 3 then a4h7 is -...In the following two A.P.′s how many terms are identical ? 2,5,8,11.... to 60 terms, 3,5,7, ..... 50 terms...If mth terms of the series 63 + 65 + 67 + 69 + .... and 3 + 10 + 17 + 24 + ... be equal, then m =...If the letters of word SACHIN are arranged in all possible ways and these words are written out as in dictionary, then t...