Question

- 07) Radha was asked to find the ave of a Consecctive de starting with 1 but the added a na tuice by mistake. So she finde the Wong ang 4511 So which no was added tuire by Rodha's

SSC CGL

Maths

Solution

224

4.0 (1 ratings)

( 1+2+3+4+cdots+1+N=frac{N+1}{2} rightarrow ) ( frac{N+L}{2}+frac{x}{N}=45 frac{11}{18} ) ( frac{90+1}{2}+frac{x}{90}=45+frac{11}{18} ) ( 5+frac{1}{2}+frac{x}{90}=45+frac{11}{18} ) ( frac{x}{90}=frac{11}{18}-frac{1}{2} Rightarrow frac{2}{18}=1 frac{1}{9} ) ( x_{10}=frac{1}{9} quad[x=10] )