RRB Group-D Model Paper 11 with answers for online practice

We know that, formula for finding average-⇒ ${\mathit{A}}_{\mathit{E}}=\frac{{\mathit{S}}_{\mathit{E}}}{{\mathit{n}}_{\mathit{E}}}\mathrm{or}{\mathit{S}}_{\mathit{E}}={\mathit{A}}_{\mathit{E}}\times {\mathit{n}}_{\mathit{E}}$Where,${\mathit{S}}_{\mathit{E}}$= sum of entities,${\mathit{n}}_{\mathit{E}}$ = number of entities,${\mathit{A}}_{\mathit{E}}$ = Average of entities.Now, according to the question,Sum of the first two numbers = 75 × 2 = 150,number = 115 (given)∴ Sum of the last two numbers = 555 – (150 + 115)= 555 – 265 = 290∴ Required average = 290/2 = 145Hence, the required average of the last two numbers is 145.${\mathit{A}}_{\mathit{E}}=\frac{{\mathit{S}}_{\mathit{E}}}{{\mathit{n}}_{\mathit{E}}}\mathrm{or}{\mathit{S}}_{\mathit{E}}={\mathit{A}}_{\mathit{E}}\times {\mathit{n}}_{\mathit{E}}$