Page 186 - Grade 10 C.Math

-v_ k|To]s ju{sf] dWodfg (mid value) nfO{ ;DalGwt af/Daf/tfn] u'0fg u/L u'0fg kmn fm

cyjf fx u0fgf ug'{kb{5 . [m / x n] Pp6} /flzsf] dfgnfO{ hgfpF5g\ .]
-u_ of]ukmn fm cyjf fx nfO{ af/Daf/tfx¿sf] of]ukmn f cyjf N n] efu ul/G5 .

f
To;}n], dWos dfg cyjf  f x'G5 .
f
Curriculum Development Centre

dWos dfg lgsfNg cGo ljlwx¿ klg k|of]u ug{ ;lsG5g\, h'g pbfx/0fdf k|i6 kfl/Psf] 5 .

pbfx/0f 1
tn lbOPsf tYofª\ssf] dWos kTtf nufpg'xf];\ M

tf}n -ls=u|f=_ (X) 10-20 20-30 30-40 40-50 50-60

ljb\ofyL{ ;ª\Vof (f) 4 6 10 15 5

;dfwfg
dfly lbOPsf tYofª\snfO{ lgDgfg';f/ tflnsfdf k|:t't ubf{ M

tf}n -ls=u|f=df_ (X) dWos dfg (m) af/Daf/tf (f) f x m
10-20 15 4 60
20-30 25 6 150
30-40 35 10 350
40-50 45 15 675
50-60 55 5 275
f = 40 fm = 1510
f
ca dWos dfg

= 37.75 ls=u|f=

j}slNks ljlwx¿

1. 5f]6s/L ljlw (Short cut method/devia on method)
-s_ dWod"Nosf] glhs kg]{ slNkt dWos (assumed mean), A = 35 dfGg'xf];\ .
-v_ m af6 A 36fpFbf cfpg] ljrng (d) = m - A kTtf nufpg'xf];\ .

-u_ fd kTtf nufpg'xf];\ .

183 ul0ft, sIff – 10